Is it because you want to see how fast this new OS is?
Office and business applications?
Just curious as to what's to come?
Since this *will* be a new Windows OS, do you have anything to add for your reasons?
As for me, I'm testing it to see how much malware we will see in the coming months once it's an official OS.
It didn't take long for us to see that users could infect their Vista OS's by not following advice from the experts.