I'm not actually sure who Scoble is (apart from being some guy with a blog) but he's some guy who's been using it and has bothered to write a lengthy blog post on what he thinks of it, so that makes his views worth something.

I've been playing with it, and I think I agree with him on most points -- it is awfully difficult to follow a conversation, and I'm not sure whether I'm going to be able to find a use for it once the initial "Hey folks, my wave invite finally came through!" conversations die down.

A view does not intrinsically have worth just because of it's existence. Scoble is a tech-evangelist; someone who uses technology and not someone who builds upon it. As someone who builds things, I value the perspective of folks who will build on Wave.