Rovio, in comparison, is estimated between the $2B-$9B range. If Angry Birds is worth that, what is Mario/Zelda/Metroid/etc. combined worth?
I do feel like they would be best served ceasing set top boxes and focusing on handhelds and making games for the PS4, XB1, and PC. Perhaps port a few of their games to iOS/Android.
To do this they would most likely have to get acquired though. I see Disney as a much more likely suitor for that than Apple.