longhorn is just another Windows, like everything else. I haven't seen drastic improvements since Windows 95. Everything else has just been based off that.
As for Microsoft, I wish they would go with the open source flow and at least try and develop a Linux based windows. I think they would find a lot of people would want it. Even if it costed a few bucks, I might consider getting it. It would need to be open source though and let people update it themselves, not like Windows today.
And as for server, just M$'s attempt to strangle-hold the server department. There's too much competition for most to switch to Windows right now, and the stability still isn't no where near Linux or Sun Os or HP RISC.
-US Nintendo Wii unmodded (waiting for modchip and install)
-US Playstation 2 v15 SCPH-77001 w/Crystal Chip Pro 2.0
-US V1.0 Xbox w/Xenium Ice and X2 custom BIOS