Microsoft unveils 12-inch Surface Pro 3 tablet from £639, arriving in August - photo 1Microsoft unveils 12-inch Surface Pro 3 tablet from £639, arriving in August - photo 2Microsoft unveils 12-inch Surface Pro 3 tablet from £639, arriving in August - photo 3Microsoft unveils 12-inch Surface Pro 3 tablet from £639, arriving in August - photo 4Microsoft unveils 12-inch Surface Pro 3 tablet from £639, arriving in August - photo 5Microsoft unveils 12-inch Surface Pro 3 tablet from £639, arriving in August - photo 6Microsoft unveils 12-inch Surface Pro 3 tablet from £639, arriving in August - photo 7Microsoft unveils 12-inch Surface Pro 3 tablet from £639, arriving in August - photo 8Microsoft unveils 12-inch Surface Pro 3 tablet from £639, arriving in August - photo 9Microsoft unveils 12-inch Surface Pro 3 tablet from £639, arriving in August - photo 10Microsoft unveils 12-inch Surface Pro 3 tablet from £639, arriving in August - photo 11