This Wednesday, 29 March, Samsung will unveil its two latest flagship smartphones; the Galaxy S8 and Galaxy S8 Plus.

They will be announced on stage at a Samsung Unpacked event in New York and the world will be watching the livestream to get a glimpse of the new designs and see the entire spec list.

However, by the time it starts there'll be barely anything to reveal. Thanks to multiple leaks, we have already seen some cracking press images of both the S8 and S8 Plus. And they certainly look like a departure from Galaxy S devices of old.

That's why we've put together a chronological round-up of all the major Samsung Galaxy S smartphones from the first to the two expected to launch this week.

We've ignored variants - the Neo, Plus, Mini, etc - and stuck to the major phones from each line. So scan the phones below and see how Samsung has changed its design philosophy as the technology has improved.

SamsungSamsung Galaxy S

First released in June 2010, the Samsung Galaxy S ran on Android 2.1 and had an 800 x 480 Super AMOLED display.

It also had a single-core 1GHz processor and 0.5GB of RAM.

The rear camera was 5-megapixels, while front was just 0.3-megapixels.

SamsungSamsung Galaxy S2

Also known as the Samsung Galaxy S II, the refreshed phone was released in April 2011 and sported a similar 800 x 480 screen as its predecessor.

The processor got a bump up to dual-core and 1.2GHz, and there was 0.75GB of RAM.

The rear camera was 8-megapixels this time, with a 2-megapixel front-facing cam.

SamsungSamsung Galaxy S3

Again sticking with the Roman numerals, so therefore technically known as the Samsung Galaxy S III, this model came out in May 2012 and was the first in the series to have a HD screen.

Its resolution of 1280 x 720 was pretty revolutionary at the time. It also sported Android 4.0 Ice Cream Sandwich.

There was a 1.4GHz quad-core processor with 1GB of RAM on launch, although Samsung stuck with an 8-megapixel rear camera.

SamsungSamsung Galaxy S4

Released in April 2013 and ditching the Roman numerals that nobody used when referring to Galaxy phones on the internet anyway, the S4 had a 5-inch Full HD display.

It also upped the processing power to a 1.9GHz quad-core chip, with 2GB of RAM.

The rear camera had a jump too, up to 13-megapixels.

SamsungSamsung Galaxy S5

Coming in April 2014, the S5 also had a Full HD screen but it was slightly bigger, measuring 5.1-inches (an LTE-A model eventually upped that to 2560 x 1440).

There was a 2.5GHz quad-core processor on board, with 2GB of RAM. And the rear camera was once again improved, to a 16-megapixel module.

SamsungSamsung Galaxy S6

April 2015's Galaxy S line was the first to offer two separate devices at the same time.

The more standard Galaxy S6 featured a flat 2560 x 1440 Quad HD Super AMOLED display, measuring 5.1-inches.

It ran on a Samsung-made octa-core processor, had 3GB of RAM and a 16-megapixel rear camera capable of recording Ultra HD footage. A 5-megapixel camera was adopted for the front.

SamsungSamsung Galaxy S6 edge

Like its stablemate also released in April 2015, the Galaxy S6 edge had a 5.1-inch Quad HD screen, octa-core processor, 3GB of RAM, 16-megapixel rear camera and 5-megapixel front-facing cam.

Where it differed is that the sides of the display are curved and wrap around to give the illusion of no bezel - a radical alternative at the time.

SamsungSamsung Galaxy S7

The Galaxy S7 was announced in February 2016 and came with a 5.1-inch QHD display (2560 x 1440).

Like the S6 before it, it was the flat-screen version of two handsets, but added a dual-pixel 12-megapixel camera for better low light photography and faster octa-core processor.

Samsung Pay was enabled on the phone, which could work through NFC and magnetic strip systems.

SamsungSamsung Galaxy S7 edge

The Galaxy S7 edge was (and still is) a true flagship phone in every respect. It too was announced in February 2016 and its 5.5-inch dual edge QHD display was simply superb.

All of the same features as the S7 were on board and the design was a touch rounder than the S6 edge that preceded it.

@evleaksSamsung Galaxy S8

Thanks to a fair few image leaks, we have a decent idea of what the Samsung Galaxy S8 will look like. Many of the pics that have appeared online have even been press images, found by trusted sources.

The Galaxy S8 itself is said to come with a 5.8-inch QHD screen (2560 x 1440) and this time the curved edges will come on the standard model. There will be no physical buttons on the front as almost the entire face will be the touchscreen.

@evleaksSamsung Galaxy S8 Plus

The Samsung Galaxy S8 Plus is thought to be exactly the same as its smaller sibling, but with a 6.2-inch QHD display instead. That is simply massive, especially when you consider the Nintendo Switch console comes with a similarly-sized screen.

There will be few other differences, including design. Even the available colours are rumoured to be identical.

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