The lights are on
Basically, I look at DVDs and BluRays... there are hundreds of different models and several manufacturers of BluRay and DVD players, on which any movie you buy from any store can be played, from no matter which company who makes it.
I wish consoles were like that too... the recent Tomb Raider exclusivity thing highlights my point. These consoles are very expensive, so much so that many people can afford to purchase only one of them for a while. This means that if there are people who will miss out on some fantastic games. It would be nice to be able to purchase a console and know that any game I buy will work for it... and it would help the developers because they don't have to go through creating all these different versions of their games.
Unfortunately, games are completely different from movies... they are programs that talk to hardware, using several different programming languages and the OSs are the translators and they each translate their own way. Same for general PCs, too- a program made for one OS can't be run on another OS...
Contrasted with movies, which are basically files that the OS of the system reads from the disk and as long as there is a translator (codec) between the OS and the file any OS can read it, since there is no special programming in the file.
It's a dream, an anyone-can-play-it standard, but unfortunately has a near infinite chance of not occurring...
With that would come a lack of innovation. Gamers would be the losers. Just like Comcast's monopoly; services suffer when one company owns all.
It won't happen, it just won't :(