I think that is their plan. There is simply no reason to build, promote, and offer FaceTime for free if you arent going to make this a part of your iPod line, too.
One another point Apple on windows - I wonder if Apple should have an X-Code plugin for Eclipse or write an X-Code for windows to get more developers for iOS ?
I dont see this happening. Everything Apple does is to try to sell more HW and keeping more people developing on Windows, minus the time and expense of creating dual development platforms doesnt seem likely. If they didnt do that when they needed app developers I simply cant see them as thinking its prudent now when Xcode is growing exponentially fast and their iOS App Store is the largest modern, mobile platform housing the best apps, bar none.
PS: There was a rumour that Marble was the successor to Aqua for the GUI on Snow Leopard. That never materialized. Gruber of Daring Fireball fame states he is sure that Marble is Xcode 4. http://daringfireball.net/2010/06/marble_mystery_solved
I'm not too bothered about iChat for windows provided other windows IM's support iChat (aol does) and FaceTime.
To be clear, iChat is just a client app that taps into AOLs AIM servers and other IM protocols, just like Adium for Mac OS or Trillian.