When will they ever do this for Wii U games? I don't care for PS4 or Xbox One. I prefer kiddie games over adult games. Mario and all that.
Probably never. The reason why you see all these smaller titles coming out for PS4 and Vita is that Sony allows self publishing for their console and does not require a minimum amount of copies printed. Microsoft and Nintendo both do.
Here is my crude Example: Microsoft may require at least 250,000 (just made up numbers to support my point) and their cut percentage is higher until they exceed 250k, smaller at 500k and bottoms out at 1 million. Regardless if you make 5 copies or 5 million, Sony takes the same cut and doesn't prohibit smaller prints.
This is also why Shovel Knight got cancelled on XB1 for a physical release. Yacht Club didn't think it was financially wise to hit the requirements that Microsoft required for a physical print.