I don't think it will be good for our eyes to play for long periods of time. But the game will certainly become the best 3DS title.
You know when your 3DS is saying to you that you should stop for a while. I think we won't have a choice here, I mean it's so fast.
I thought Nintendo was being an idiot halting the next Smash Bros. to work on this. Now I see how amazing this is. I wants.