Ed130 said:
Because PC offers unfair advantages, namely mouse and keyboard.
http://www.maximumpc.com/article/news/rumor_microsoft_killed_pcxbox_cross-platform_play_because_%E2%80%9Cconsole_players_got_destroyed_every_time%E2%80%9D
I mentioned in my post that using different controllers is a problem and I was really speaking to the elitism issue in the OP. You're right ofcourse. It almost seems like the main divide now is control method. Competitive games would suffer the most I guess. Although, the assumption seems to be made that one team would be all controller wielding players while the other is all keyboard and mouse... mixing would maybe help a bit. But your point still stands.
Unless it's a co-op focused game any sort of crossplay has resulted in one side destroying the other.
TBH I'd like to see more co-op games being made. So the possibility that there could be a cross-platform incentive to get people to make co-op games is something I encourage. A non divided player base could benefit indie devs making multiplayer games that aren't competitive. But there is NO cross-platform gaming at all. Not even for co-op. Having the option could result in some interesting games.