and what about the outrage when they don't?
seems like a lot of diehard microsoft fans are hoping and expect Sony to charge, even though they have no evidence to support their beliefs.
Well, it's all speculation until Sony confirms it of course.
The evidence that is fueling these rumors:
1) Reporters asked Sony at the PS Meeting directly whether online play would be free on the PS4, and Sony wouldn't answer the question, saying they aren't ready to talk about their PSN strategy. That made me raise some eyebrows, because it sounds like they're having a change in strategy with the PS4. If MP was free, I don't see why they wouldn't have just confirmed it to lay this speculation to rest.
2) Rumors that PSN is getting replaced by Playstation World, and that most of the features Sony showed at the PS Meeting would be included with this subscription. The rumor didn't say whether online play would be included with the PSWorld subscription or not, only that most of the new features would be a part of this subscription. If Sony is relaunching PSN, this would be the time if any to have MP be a part of the subscription.
Personally, I think Sony is going to have MP as a part of their new PS World subscription. I think Sony needed to have MP be free on the PS3 to compete with the 360. Sony just did not have the same level of infrastructure that MS had set up since the original Xbox, and they were playing catch up. It does cost money to run the matchmaking servers, and surely not an insignificant amount since so many players play MP games (Call of Duty being the biggest of course). I'm assuming that Sony offers a matchmaking service to developers like MS does with XBL, but it is possible that Sony doesn't have any service like that, and leaves it up to the developers to make that themselves, in which case the costs are less.
Sony does need to find ways to make more people subscribe to PS+. If they can find a way to improve matchmaking and can justify charging for online play or find other ways to make it a good value, they are going to pursue that. MS makes tons of money with XBL, and Sony surely wants a piece of the pie. MS isn't standing by, and I expect there to be lots of big changes to Gold next-gen that can compete with what Sony is offering today, and Sony needs to be prepared and have a good answer to this, and position PS+ (or PSWorld) as something every Playstation 4 gamer would really want to, or need to subscribe to.