I also think that the more that is done in a scripting language the more of a library of scripts is built up both in-house as well as popular ones shared online. With PowerShell's functions, modules and script importing, I should imagine that the more you use scripting the less script you need to write.
Also, I can imagine GUI front ends being developed for PowerShell much like they do for WiX using Votive.
-- Stop your grinnin' and drop your linen...they're everywhere!!!