Xen on 18 February 2014
It shouldn't be a surprise to anyone that PC and Smartphones lead the charge - they are the easiest and cheapest to develop for, and also the easiest to publish on. Indeed, that should be the headline. Consoles are traditionally more difficult in all aspects - well, aside from this gen and x86 galore on PS4 and XBO. Publishing is still a bit more difficult for most.
The real news here is how pathetically low is the Wii U %. That's honestly bad news.
