If you thought the iPhone 5S screen wasn't big enough, especially against the Android competition, then there's good news: Apple has launched the iPhone 6.

The new iPhone 6 now comes with a 4.7-inch display as well as more power, more storage, and more features. We've been playing with the new flagship device at the company's iPhone 6/Apple Watch reveal in Cupertino, ahead of the global launch on 19 September to find out what's what.

There is no doubt about it, the moment you set eyes on the new iPhone 6, you'll look back at your iPhone 5S and realise that yesterday's device now looks old, dated, and somewhat puny.

The new iPhone 6 doesn't take things as far as the iPhone 6 Plus, but the screen expansion is still enough to notice and enjoy and get excited about. It expands to 4.7-inches and sees the resolution move to the rather unusual 1334 x 750 pixels, 326ppi. The pixel density remains the same as the iPhone 5S, so it will be as sharp as before, with the increase in size matched with an increase in pixels.

But it's not just about a bigger screen in a similarly-designed smartphone to what we've seen before. The whole experience has been crammed into an incredibly thin chassis that emulates the iPad and iPod touch. The iPhone 6 measures 138.1 x 67 x 6.9mm.

The edges are curved and rounded, making it comfortable to hold despite the increase in size.

The iPhone 6's svelte body is only exaggerated further by the fact that the rear camera juts out from the back, presumably too thick to be shrunk any more. Strangely that camera doesn't upset the balance of the back of the phone and it can still sit fairly flush against your desk.

Those that pay attention to these things will notice that the power button has moved to the side and that the volume buttons are now elongated rather than circular.

Moving the power button to the side means it's easy to reach when gripping the phone with one hand. If it was on the top, stretching your finger up to hit it would mean changing your grip and possibly dropping your phone. It's something that Samsung has done on its larger handsets for a few years and Sony has made a feature out of with it's aluminium side button on the Xperia devices.

The front now features curved glass too, bringing back memories of the Nokia Lumia 800, yet the finish here on the iPhone 6 is considerably better executed. It will be interesting to see how strong the new design is to the daily battering iPhone users are prone to giving their iPhones.

Beneath the screen is the TouchID home button. Apple might have made the screen bigger, but they aren't following Android down the no physical button path and TouchID will play a bigger part in Apple Pay as the new payment system rolls out.

The new looks and display might be the most noteworthy at first glance, but it's what lies beneath that's worth examining, as the updates here are what will carry the iPhone 6 through the next year of its life. 

There's a new 64-bit A8 processor, partnered with a new M8 coprocessor, the adoption of a new Wi-Fi standard (802.11ac) and VoLTE. In our brief play we were impressed by the speed which some of the bigger games opened, but naturally didn't have the time to put the phone through its paces.

But the upgraded power should make everything from loading games to surfing the web a lot quicker, and it will be something we will be keen to check in more detail in our full review when we get access to a device, particularly how the battery performs.

It certainly felt responsive in our play at the Apple event and we noticed nothing out of the ordinary compared to the iPhone 5S.

In the US you'll get Apple Pay, a quick payment system that will allow you to use hundreds of thousands of contactless payment points in the US. Apple has confirmed that it will be rolling out the service globally but haven't detailed when that will be.

The addition of NFC to the handset enables this contactless connection, but it's not the technology so much as the payment system that's interesting. Apple wants to replace your wallet, letting you tap and pay with your phone. You'll be able to add multiple account cards too.

READ: What is Apple Pay and how do I use it?

Apple is happy with the camera performance on the iPhone 5S so it is sticking with the same image sensor for the iPhone 6. It did however add a few new tricks, thanks to improvements with the processor that powers it all.

Now you can take panoramic shots up to 43 megapixels, use a new feature Apple are calling Focus Pixel for better focusing, and benefit from HDR in video, slow-mo up to 240fps (twice the frame rate of the 5S), and a few other tricks like image stabilisation, although this is digital, rather than the IOS of the iPhone 6 Plus.

There's also a Burst Mode for the front-facing camera making taking a selfie a lot easier.

The iPhone 6 is the logical step-up for iPhone owners and one that upgraders and disillusioned Android users will come flocking back to, now that the small screen size issues that were troubling Apple have disappeared.

There is no doubting that the new iPhone is a lovely device with plenty to offer and a leap forwards in design and power.

The new design (at 6.9mm thick) is very thin, however we aren't still 100 per cent sure on the bands that break the metal casing on the back.

There are still plenty of questions to ask about the new iPhone 6 to determine whether it's worth jumping for the new phone at launch, or sticking with the iPhone 5S. But we'll bring you all the details once we've had the chance to full review the new iPhone.