No more defragging.
real time chk dsk while idle, if needed.
15 second or under boottime.
free antivirus in OS.
More config like tiny firewall.
Better rollback like go back except, exclude dirs, drives and file types--with vault to retrieve rolled back files.
Built in spell checker that will work in every ap.
Better backward compatibility with old programs and hardware.
Better termination of programs that freeze machine up with 100 percent cpu grabbing.
Better memory stick diagnosis when bad. (bad ram will cause all sorts of os wipeouts every few months.)
Protect registry from program writing to it except own portion of registry windows allows. Also, programs should stay in own directory, never allow writing outside own dir.
Built in wap text browsers with on fly image show, for dialup users.
Built in MS dialup accelerator, like slipstream.
Built in vb files, sun java, and autohotkey.com engine. Should be under c:\program files\languages\sun etc.
Built in feature to restore each installed program individually with one click, once you do a system reinstall. Better tracking of installs that are classic and those we just try.--eliminate reinstall hell of reinstalling all relied on aps.
Ability to run linux applications (reverse wine.)