Mr. Lunduke fails totally to see that Steam isn't a simple online store, like Ubuntu's Software Center. It also is a social network.
He also fails to see that Steam only initially
will be released for Ubuntu only:
This doesn’t mean that Ubuntu will be the only distribution we support. Based on the success of our efforts around Ubuntu, we will look at supporting other distributions in the future.
From Valve's bolg about their Linux efforts: http://blogs.valvesoftware.com/linux/steamd-penguins/
I doubt that it will take a long time until we can see Steam running on Fedora, Arch or Slackware.
Using the Ubuntu Software Center for selling Steam games will only benefit Canonical and Ubuntu's users (and in fact cut down the sales for Valve), selling Steam games via Steam will benefit any distro and their users.
I wonder why he also doesn't demand that Desura should be merged with the Software center, they are also competition.