Microsoft XNA - The YouTube of Games?

I admit it - I love YouTube which is why two out of my 5 posts have YouTube in their title. Microsoft recently announced its XNA Game Studio Express Project wherein for a "MERE" $99 it will give us bedroom/couch potatoes an opportunity to create games out of our ideas and share it.....BTW - XNA stands for "Cross-Section Next-Generation Architecture" (Someone put their marketing mind to this one! :) ) A key feature is that according to this article, most of the popular games that are developed using this strategy may be available as a free download on the Xbox Live network.

Now - the question is whether the opensource community will be able to bring in somekind of "--[GNU]-- Next-Generation Architecture" or "GNA" that will compete with this technology head-on? THAT would definitely be the next YouTube of Games...

Cheers - Nomad