I disagree, I would love to only have to buy one console and benefit from the offer of Sony, Microsoft and Nintendo at once. Why would I want to have 3 plastic boxes instead of 1?
So you'd like if there was just PlayStation and everyone that wanted to play on console just went to that.... it would make things simpler. Devs would only need to make one console version.
Multiplayer servers would be easier to populate.
But we would have less competition...would be a tradeoff.
Only way I see it happening is if Xbox are allowed put GP on PlayStation.