Originally Posted by Von Paulus
Yes, nowadays mainstream gamers, which means mostly they are console and mobile devices players. Not mainstream gamers from 10 years ago.
However that doesn't mean that all console players are mainstream gamers.

I would say the vast majority of mainstream/casual gamers are on the PC. Look at Popcap games, flash games and even World of Warcraft. Consoles are more hardcore, even though they have mainstreamed a lot to appeal to a wider audience.