They should have published the designs and opened up the code so that others could build a platform around the products they have cancelled. Just allow anyone to make a Zune or a Band clone and if there is a platform that emerges later, get back into it.
Microsoft should just forego consumer apps and devices. Almost all of their late to the market ideas are light weight, copycat, throw money efforts with no originality or differentiation.
This is sad cause the Band seems to have a good following and they should just have improved reliability with a new iteration. I've seen a lot of people using them and reviews have been good.