CatBus,
Interesting. Those are good points, but I actually see the AVCHD as possibly being the MOST important release. I'm looking at this from a "spread HD restored SW to your less tech-savvy friends" perspective.
While it won't look as good as the BD or MKV, it'll still look pretty amazing. And I know plenty of people who have BD players, but I literally know no one (save some people on internet forums) who has a BD burner (I don't have one either). I think for most of us trying to spread the gospel of an HD, restored SW, being able to get near-BD quality with only a DVD burner is essential.
The MKV is great and all, but to me is the least convenient, and probably not very useful to our less tech-savvy friends.
Just my opinion.
edit: whoops, everyone answered this much more quickly and succinctly than I did :)