UPDATE: This was live on Thursday, Oct 25, 2012. Obviously it’s no longer live, so I’ve removed the embedded video window from this post.
You can find both the Windows 8 launch and the Surface launch here: http://www.microsoft.com/en-us/news/presskits/windows/liveevent2.aspx
You may have to click around on the bar to find the place where the actual events start, because it currently looks like they just recorded the whole day and put it all in one long continuous recording – including the hours of waiting in-between.
I do highly recommend taking the time to watch them.