Aren't they good enough already? I mean, watching A New Journey, it seems so good alreadly that it doesn't need to be in high definition.
Having watched SFTH on PBS in HD and on the DVD, there is a very noticeable difference between the two. The picture is more crisp and sharper, which makes it look a lot clearer. The the names of the songs are also easier to read in HD.
I would look forward to anything CW to come out on Blu-Ray. Hopefully CW Ltd. will make it happen.