What Microsoft can learn from Apple
Ease of use is the staple that makes Movie Maker a joy to use. There are, however, some areas, where Microsoft can learn from Apple.
The number one feature I would add to Movie Maker is a DVD Menu tool similar to iLife's iDVD tool. You'll find that it's easy to create a lot of video in Movie Maker that you can then add to your web site or e-mail to a friend, but trying to create a DVD can be challenging. There are no Microsoft-supported tools that allow you to create a DVD with a menu system for your new movies.
I'd also like to see Movie Maker take another look at high definition support. Apple's iMovie supports the new high definition video format. Microsoft isn't reticent about the idea of HD either, as they are requesting all of their future Xbox 360 games to be built in HD. So, why not video too?
Finally, and this is just a picky issue, I would like to see support for broader video formats such as Flash Video, QuickTime, MPEG, and others. You can use tools such as AVSConverter to perform this conversion trick, but it would be nice to have all of this in one tool.