I saw the interesting intros for Serious Sam.
Whow, would be great to play this with 2 or even 4 people on ONE big screen with one chromecast.
@Phettsack : Judging by the number of folks that have had issues with their controllers and buttons sticking etc, probably not a bad idea to get an additional controller as backup just in case (if you're using CCU of course). In fairness to Google I've not had any issues with either of our controllers yet, but it is in the back of my mind that it might start to play up sooner rather than later.
I have problems with my controller ... but thanks to the PRO offers... in March I can include a new controller in my monthly budget for games.
So I would say yes, it is worth having a backup