You may notice that this screen-shot above is from a Windows-based laptop. Well you'll soon likely see a macbook or something like that in thier ads.
Windows users have had Netflix Watch-Now for quite a while now and Mac users have had to sit by and wait. Well with Microsoft's Silverlight, Netflix watch-now streaming has finally arrived for most Mac users. I say most because it will only work with Intel-based Macs.
Note that as of tonight there is no word of this on the Netflix site, but my guess is we'll see it Monday morning (10/27) since that's the date of the press release Engadget has posted ;)