Do you think that future incarnations of Android will be 'pre-rooted'?
I've heard that honeycomb will allow screencapping without root, so ait would seem SuperUser permissions are becomig more 'lax?
No. Root is a very dangerous thing in the wrong hands. Most Android malware first tries to root your phone to allow it to do nasty things. Screen grabbing will just have it's required permission level changed to allow it from non-root/su accounts.