Ars Technica has done some really nice work around Steam and what players are buying and playing on that service. If the stat that Steam makes up 75% of PC sales today is even remotely true, it only makes this reporting all that more interesting.
It’s worth a read for sure, and hopefully they drill down into MMO-specific data so we have something more meaty to chew on. That DoTA is really popular is nice, but yea, not that interesting as a discussion topic. Good start though, and something I’ll be keeping an eye on for sure.