I can start eShop, find a demo click download, exit eShop back to main Wii U interface before my PS3's shop have even finished loading/booted.
Pretty much this. Accusations of it being slow compared to the other shops is hilarious.
Look, Wii U is pretty fucked right now. No one's denying that. However saying that they should go third party or make a PS4 and they'll somehow magically win again is absolutely absurd. Metroid/FZero/etc do not sell consoles. They're awesome but overall niche titles. Right now Wii U's problem is that they didn't capture the CoD /AC/GTA/Madden/FIFA crowd enough to push them to their online infrastructure. Kids will go to whatever console their friends are playing CoD on, its that simple.
Let's focus on having actual solutions that would be within the realm of reality and not the fantasies of the hardcore.