I'd love to see MMOs much more integrated with other technologies other than the full-fledge client executable... Like webpages, email, mobile apps, and SMS. So while you're home, you can play the full game, but while you're away you can use the mobile app to basically play minigames that effect your main account, and while you're at work (heheh) you can use a website to manage aspects of the game such as political or trade agreements (in an empire builder, for instance).