This thing seems like it would be awesome until you actually try to haul it around with some games, especially when you've got your smart phone right there.
I was thinking exactly this.... I actually prefer my DSlite which has a bunch of games and apps loaded onto an sd card. Including a word processor and a Bible reader.
(And yes I only loaded games onto the card that I actually own the carts for.)
But this way, there is no fumbling around with game cards, and the dslite fits perfectly in my pocket by itself.
This is why I still haven't bought a 3DS, even though it's technicaly "better" it is functionally and convenience-wise, worse in my view. It would feel like a step backwards having to carry cards around again, seriously who would do that? I prefer to carry around as little as possible. Phone in left pocket, DS in right pocket is all I want.
P.S. The Neo Geo thing looks awesome, but many games require ABC or BCD buttons to be hit simultaneously, (like Samurai Shodown) and I don't think the SNES/DS layout would work well for the thumb alone in that respect.
What does the small print say on that console at the top? Looks like it says "Portable Multiplayer System", is it two player like the SupaBoy?