The announcement that MS, made stating that it will change the way your whole computer functions..... is a bit over exagerated....
It adds a couple of hotfixes, installs a firewall and sets up your security centre (which only monitors your firewall, AV software and live updates).
IT installs DirectX9.0c (much more stable than b)
You can afterwards install Media Player 10 (i dont like too much, but i suppose its cool)
It RE-opens a couple of DSO-exploits i closed, so i just closed them AGAIN... but other than that, everything is the same, no nasty side effects or problems...
Nero burning rom complains that its not compatible with it, but it IS.
ANd device manager moved a little bit around in the system properties.