Brad Feld's post refers to an article titled "Changing Climates for Microsoft and Google, Desktops and Webs". Terrific read about the changing landscapes of personal computing, software, and media.
As the robber barons found out, when a railroad achieves critical mass you make a boatload of money. Better yet, once that track is laid it's very difficult to move aside. Like any good robber baron, Microsoft would love for Google to compete on the same field where Microsoft owns all the rails and most of the trains. In fact, that kind of GoogleOS is Microsoft's wildest fantasy come true. Microsoft would be fully capable, and would probably relish the opportunity, of roughing Google up, dragging them through the mud and sending them on their way - just like they did with Sun, Apple, IBM, Netscape, Novell and Digital Research.There's more. A lot more. Check it out.