I really don't get the negativity towards Stema MAchines... a lot of you guys sound JUST liek the naysayers when Steam itself was annoucned. And now look at it.
Valve isn't playing by console terms. And they are playing a very long game.
Now, these machiens have limited appeal, I don't think anyone can argue that point (with the exception fo the cheaper stremaing only versions at least - I know I'm interestedin one of those).
But in 3 years? When you can pick one up that trashes a PS4 in terms of specs, probably has a much larger game library than PS4, and probably features new technologues to immerse you further in the game (Oculus, 1600p/4K, etc)?
That's when people will start to bite, just like they did last gen. No one made PC gamer easier. It kind of got easier as technologies evolved, and people flocked to it because of new genre's new types of games, and more powerful hardware.
Same thing will happen this gen, except with Valve actively pushing these thigns to market, it'll happen even faster.
I wouldn't be suprised to see 15 million concurrent Steam users come winter sale 2016/2017.