We have Internet today, there's no need to lug around a computer to game with friends anymore.
Every Monday and Friday I have a gaming session in the evening with my friends. We play a range of games and we chat via Teamspeak at the same time. Works fine.
Of course, if you want to participate in a LAN competition, we're not talking about the same thing, but even then, I would think there are some who prefer to lug around their tower instead of trusting a laptop.