I keep hearing that argument and I simply think that's false. First a LOT of gamers of this generation don't even remember D2. I think WOW sold MORE copies of D3 than the old D2 (which aged very badly btw). These 100-200K hardcore D2 players are not a big group.
D3 sold 2 million extra copies AFTER its ...6 weeks launching period: 333.000 per month actually up to Christmas.
What I think is that the VAST majority don't care about on line only. Only the players of hacked copies complain.
The fact SimCity stays on top of recent sales says enough; EVERYONE has internet so ... everyone plays on internet, web browser games, I Pad games, and of course PC games.
Also: for the first time EVER I am interested in playing SimCity, now that it is on line and you can show your work to other players. Nice.
Stop being lonely basement dwellers with hacks and mods: that's so old these days. These days I show off my hardcore avatar to others. That's cool.