I have seen warnings given to others and myself at gamestop about the Wii U being a different system from the Wii. I was already aware of that. In one particular case the mother and child weren't aware of it, they just though it was the Wii so they left the store without buying anything.
My brother for a long time also thought it was just a peripheral to the Wii. I literally had an argument with him about it lol. BTW, this isn't children arguing, I was 32 at the time and he was 42 lol. Was rather funny though.
Beyond a handful of experiences like that, more so shortly after it was released, I haven't seen too much of it. I also haven't seen someone trying to put a Wii U disc into a Wii.
With all that said, I have also seen some parents try to purchase PS4 games for their childrens PS3's. But there tends to be a bit less confusion on that side.
Gotta figure out how to set these up lol.
