[pyre]

You're also forgetting WinFS. WinFS was apparently his baby during the development of Windows Vista (aka Longhorn), but was one of the things cut when shedding cruft. I can't find a reference to it, but I recall hearing that there were grumblings from the rank-and-file about 'making a pig fly' (not exactly, but something similar) with regards to Gates' focus/drive on WinFS.