I guess they could do that, but many games would only be playable in handheld mode though. Would still be cool to see.
Yeah it would probably require the touch screen etc. I can imagine playing games like Samus Returns, Luigi's Mansion 2, Fire Emblem Awakening, Monster Hunter 4, Animal Crossing New Leaf and Mario Kart 7 on the Switch's bigger screen. There are a lot of cool gems on the 3DS that I feel could go well with the Switch.