Would be pointless. Most users don't read or follow instructions, and things will end up wherever they decide to post it. That happens now constantly with topics like new builds or graphics cards (which have their own subforums), and mods have to come in and move the thread. Heck, I spend a good chunk of my time moving threads around and linking users to stickies because they choose not to read them before posting a question.
You're welcome to create your own discussion thread on the topic of Windows 10 or jump into a current one--not that there are many, considering that not many people have adopted it while it is in this preview stage. When the Windows 10 subforum goes live, all threads tagged with Windows 10 will be moved there, but until then, no, there is no specific thread of area where discussions of this sort are taking place.