My expectations have changed drastically since I first filled my fridge with Virtual Console goodies all those years ago. Cross buy is a prerequisite for me at this point. if I were to ever amass any sort of Virtual Console collection on the 3DS, I would need to be confident that it would also be playable on Wii U Virtual Console.
So far on the 3DS I have been happy to purchase handheld Virtual Console games (at least, those meagre few that we have been released) as those are games that I would not wish to play on a TV screen. Purchasing Super Nintendo games on 3DS and then having to buy them again on Wii U virtual console, however, seems crazy to me.