Convenience is exactly why this is interesting. I don't buy many games outside of Steam because it's so convenient not to have to back up installers or hunt for a particular XNA version or what have you.
There's a low barrier to entry to trying something that runs in a browser. I just navigate to the page, wait for a progress bar, and maybe bookmark the game if I like it. The low barrier to entry is one reason that flash games are still so popular. http://xkcd.com/484/
No, it's really not. This is what consoles are trying to become, but they're also a long way off. They're also expensive, dedicated machines.
Even assuming this IS what console are for, why in the world are you going to complain about more competition in the market for a good way to distribute games?
There's a low barrier to entry to trying something that runs in a browser. I just navigate to the page, wait for a progress bar, and maybe bookmark the game if I like it. The low barrier to entry is one reason that flash games are still so popular. http://xkcd.com/484/