PSP Go hands-down! The first real gaming device to merge handheld and home console together.
Plays all PSP/PS1/NES/SNES/GB/GBA games. (of course with proper emulation), plays videos & mp3. Had PS Store support *not the bed but still, if only Sony supported their digital games back then as they do now it would've been more impressive.
To my memory, the first digital-only gaming device and the first gaming device with the ability to hook up to your TV and play on the big screen with a DS3 controller. None of that Vita cross buy stuff needing 2 separate consoles, and possibly what Nintendo is/should be looking to do next)








