wiiU is only convension when you try desperately to rewrite the history you want to believe in. wiiU was introduced with a video of all the "possibilites" a tablet controller could do to "change the way you play". of course you won't remember the 20 min before or after the EA "unprecedented partnership" was annonced because you know all everything nintendo and everyone else is wrong.
oh, and the virtual boy wasn't convensional either.
If the kind of things shown in the video above move a console into unconventional territory, then the PS4 might as well qualify too with its share button and touchpad. Actual games trump possibilities, so a reel of multiplatform titles holds more weight than that video.
The Virtual Boy wasn't a home console. It wasn't a handheld either. It was a standalone product that failed to establish a market.