Well at least we'll still be able to provide access to post formats ( add_theme_support() ), but I was very much looking forward to being able to do this. Lucky I'm training some clients today and won't have to retrain them much when 3.6 comes out, but to be honest, I'd rather have the new UI and retrain again.

Oh, and @Rob Lawrence, It's so that theme developers can change the look of each post depending on the post format. Pretend you select the video post format, and we can make the background of the whole post darker than other posts (so that it's not distracting to the reader watching the video). The same goes with other things, such as quotes (we can blockquote the content's tag, and use the contents tag as the author, or similar.

There's plenty to do with post formats, and I don't understand why Jeffro used them as categories, as I don't see them like that at all. I see them as a way to dynamically and easily make your site much more diverse.