Well, this week I finally got a chance to play with my CF8 beta server, and I'm liking the new user interface tags. It's not that they do anything revolutionary, but they do the things that we developers need to do regularly with ease and consistency.
For example, the cflayout tags will help make websites with cleaner layouts. I heard someone remark that the same thing could be done with 3 lines of CSS, but I've probably seen around a dozen different ways to create what looks like the same layout using CSS. Cflayout will allow teams of developers to more easily get on the same page and do things more consistently.
The cfpod tags seem a little goofy, but allow for small contained parts of pages that can be refreshed.
All in all, I'm seeing some very positive changes being made to ColdFusion so far, and I'm looking forward to exploring it further and start building full apps in it.