I didn't hear anything about availability, previews, etc. Did I miss something? I listened to the live stream in the background, and also skimmed through The Ve

I didn't hear anything about availability, previews, etc. Did I miss something? I listened to the live stream in the background, and also skimmed through The Verge's article and live stream. As a happy Windows user, this looks exciting. I hope that there'll be a Windows Pro upgrade path that's not pocket-heavy, so I can update my 8 year old laptop, and my recent desktop without paying too much.