I kind of have the opposite concern of some of the folks here. I don't see how the Marketplace fees are going to be enough to support 2 full time salaries. Let's say that on average, 10 games are sold per day, at an average $20 fee. Could you live on $100 a day? And some of that money has to go to pay for hosting too.
These fees are a step in the right direction, IMO. I just don't think they'll be enough.