I see it as a way to get people into the ChromeOS ecosystem without having them jump in the deep end with a machine that can
only run it. Consider you're a business ... you are already Google Apps users, your users spend
most of their time in Google Apps. But not all of their time. There are still bespoke apps that only work in windows, a smattering of people that can't do without real PowerPoint or Photoshop or something.
Now you're going to purchase new laptops. For support you want to get the same thing for everybody. Are you going to get ChromeBooks? No, you can't. But could you get Win8 laptops and then rig them all to boot up straight to ChromeOS with a small escape hatch back to Windows land for those who really need it? Absolutely.
Of course, none of this flies just yet, but Google is all about skating to where the puck will be. So they are skating hard to this world where we are all more than satisfied to do everything in the cloud, and running anything locally seems a bit like changing your own engine oil or running a generator to make electricity would seem to us.