I have said this multiple times whenever game consoles come up. Their days are numbered. I think in about two years, games on the iPad and iPhone will be as good or better than the console games we are playing today. And if ATV opens up, well just forget about it. Sure there will be the diehards, but I will state that in 2 years we will see the huge decline in console sales. Apple is already there essentially. As the quality of the games improve, their chips improve, and the MFi accessories improve, they will own the consoles in two years. If ATV opens up this year, it may be sooner. It's my prediction and I am sticking to it.
Oh, I am sure that Chromecast and Roku will have a strategy of their own, so if I am right the competition will heat up and Nintendo, Xbox, and Sony PS will get clobbered. Eventually they will have to morph into something new. I think they can still try to sell hardware, but something closer to a roku. Otherwise they will need to look at what Sega did and drop the hardware all together and focus on the software.