Fun picture, but unfortunately from my research i only have one complaint:
Aren't their chests a wee bit big?
Now, hear me out, I'm male, big breasts are (generally) nice
According to what I've dug up from other places before (mainly wikipedia, but meh, it made sense), each of the "Tan's" had breasts approximate to how much ram they used. For example, compare 95 Tan to XP Tan or Vista Tan. You'll see a major difference.
Now, compairing genesis and gamegear who wouldn't need anywhere near as much ram as the latest systems to said latest systems... They're surprisingly well endowed.
My little rant is over, other than that, awesome pic eh!