It'd be better for gamers if Nintendo started making Vita games. 3DS isn't capable of running Little Big Planet without massive compromises to the actual game design. It uses multi touch which 3DS doesn't have.
You'd also have to cut back the scope of level design due to lack of processing power.
There is nearly a generational leap between the 3DS and Vita and it would only negatively impact on the end product if compromises were made to port games from Vita to 3DS.
Add in that games like KillZone would tank harder on 3DS than they did on Vita and going 3rd party for anything other than jak and daxter would be commercial suicide. It would also mean Tearaway would not be possible until next handheld gen or would have been an iOS game.
RIP Dad 25/11/51 - 13/12/13. You will be missed but never forgotten.
