For the first time in the history of the PC, Microsoft is rolling out a new Windows ecosystem for which they will be the sole software distributor. If you buy Windows 8, the only place you will be able to download software that integrates with its new user interface will be the official Windows Store. Microsoft will have complete control over what software will be allowed there.

via Critical Detail.

This article has a very lengthy description of Microsoft Windows and MS-DOS describing  past evolution of the PC to where it is now going.  In essence, Microsoft want to be like Apple.  It will be interesting to see how this all plays out in the next year.  Here’s another blurb:

Now, this is apparently a point of some contention. Perhaps because Microsoft has not made a bigger deal about it in their press releases, not everyone believes that distributing software for the modern UI will require developers to get Microsoft’s permission. But they are wrong. In order to set the record straight once and for all, a complete, thoroughly researched analysis of Microsoft’s official publications on the subject is included as Appendix B to this article. It demonstrates that there is no method for developers to distribute modern UI applications to the internet at large without receiving explicit approval from Microsoft.