I see all these people griping and moaning about the lack of landscape locking, but I can't think of a single occasion in which I've wanted landscape mode locked, while laying on my side. Usually, I'm reading something in portrait mode and I scroll vertically, using my thumb. Personally, I wouldn't miss that option one bit.
I agree completely and locking in landscape would not make sense because the home screen will remain in portrait. I am excited about this feature.