Like ps4 and x1 are gaming machines that happens to also be media centers, it looks like the next apple tv is going to be a media center that also play games, which seems similar to pstv approach. 

Apple entering the living room gaming space will have impact at the traditional players? Will it be a game changer or it will be a feature that will lay in background ?

I always remember that the iPhone and iPad made a quite revolution in the game industry. Apple tv has the same potential. Apple may not look like, but they own one of the most important gaming plataform, iOS.

Yes, it has, but the 2015 refresh are heavily rumoured ( and when it comes to apple is the same thing of knowing for sure) to have a top-notch mobile processor and gpu, the a8x, that is more capable than the last gen machines. And that gaming will be a big part of it from now on.

I doubt it will be a game changer at all. The app space in the iOS and Android markets are flooded with an enormous amount of garbage that has completely tainted the reputation of the platform in the eyes of those who would actually care about big-tv gaming. And those markets are in total chaos. Odds of success are almost completely unpredictable. And what's even worse is the ridiculous ammount of Freemium games have made the expected cost of games on those platforms absurdly low. Which means that AAA development for iOS is a massive, massive risk. iOS and Android are such a huge cluster **** right now that it is not a sustainable, safe platform for AAA development or anything remotely comparable. That's why companies doing work there make such absurdly cheap, easy to make games.

The iOS/Android audience is fine with those types of games. 

Though I'm surprised at some of the production values on some of the more modern iOS/Android games ... there's some decent looking games. 

Eh...

I'll wait and see.

That audience is.  But that's the thing problem, the audience.  That audience also doesn't care what they play on, clearly.  I don't see that audience buying Apple TV to play their super simple, touch-screen orriented games on the big tv.  The audience who would care to put games on a TV?  I see nothing in iOS that would appeal to them. 

iConsole?

Are there any exclusive games yet?

Here's a great chance for Sony to make a deal and bring PSNow to AppleTV.

From the rumoured specs (and cost) it sounds like it will have no effect on the industry at all. You may as well strap on a Ouya to every TV you sell and talk about how it is going to disrupt the console industry.