I'm not a big fan of new clone consoles, If I want to play any of the games this thing plays I'll play it on the originals. Ya I can see it being a space saver. But I still prefer the original consoles. Even if I want to play GB/GBC/GBA on the TV I can pull out the Super Gameboy or Gamecube with GBA attachment.
I really don't see me buying one unless I come across one at a garage sale dirt cheap.
Although I must admit I like the portable NES/SNES models.
I think the only way I'd buy a newer clone console on release is if Nintendo them selves released a well made model that plays all the old games. (and I'm not talking about downloading games like on your Wii/WiiU) Like for Nintendo's next big Anniversary as a Limited Edition, It could have a download ability But it has cart slots for all the classics. But I doubt this could ever happen. lol
But I do see the interest for someone who wants to play the old games but don't want to shell out five times the money to buy all the consoles this one machine can play.