@Bob's comment of an all in one media device instead of a console. It's called a computer Bob, you use it for your work every day, way to totally miss that knowledge though.
Seriously, PC gaming is stagnant atm simply because everyone is happy to ape what already sells. With HD being the standard for both computers and TVs now your PC hooks to your monitor literally the same as it does to your TV, just need some game designers to point it out, incorporate the ability to use controllers which most major consoles already have computer ready USB controllers, and just come together and show the gaming world that the console is an out dated idea. Consoles are from when most people's computers were expensive dinosaurs their parents wouldn't let you touch, so game makers had to give the kids their own computer hooked to the TV.
In the tech savvy world of today most kids know how to upgrade parts on their PC, and your PC can easily run circles around all 3 consoles combined for the same price when you build it yourself. As is consoles remain due to fan boyism, and the unwillingness of PC game makers to stretch out and show that your Xbox is an expensive paperweight when compared to your computer.