If this works out then it's a great thing, but I'm not really seeing this becoming anything big. They were using Minecraft to promote this while in real world the company Mojang has no intrest for it.
From my point of view, I wouldn't want anyone to modify my game and re-sell it as their product(This is what they were selling as well, "hackable games").
All the games designed for touch have to be re-created for this device and it's game controller that does not exist yet. I think I actually read that they only have one of these consoles and that one is just a prototype that doesn't have any powerful hardware in it, and is due to change.
It's also a big problem to sell something targeted for poor people, because it can become exactly as the android market where everything has to be free to get plays. When something like apple products are known to be expensive and you can clearly see that these people are willing to buy whatever new you wan't to sell them.
Is there going to be any interest among the non-game developers?
I think if there's any great innovations made with it, it may have a chance.
One of my favorite TV-shows are the English, Canadian Dragon's Den and the American Shark Tank.
---
Actually I think I have a better idea... What if they would just make android controller and a TV output for multiplayer games that supports them? You could still get these games from android market and play the same game on your tablet...