I always felt that Microsoft fouled up back with Windows NT and Windows 95. If they had just ported the Windows 3.1 Operating Environment to run on top of OS/2 they would have had a strong base quickly rather than building a new OS with NT. They would have avoided the anti-trust as a (divergent) version of OS/2 would have been available from IBM and anyone else would have had to start the cloning from the beginning. The whole Win9x vs WinNT split could have been avoided.
I would expect that the API to interface the command line MS OS/2 to Windows would be different from the IBM OS/2. The same for the command shell. Programs would have needed to be ported to the new OS/OE combo but considering it really would have been a superiour underlying OS and they could have fixed a lot of defects in the Win 3.1 design at the same time. They would have been competing with IBM OS/2 but with the underlying Windows programming APIs and DOS command line (enhanced of course) would give MS OS/2 the advantage of people being able to use what they know.
Right now they are running into problems with Vista being years over due. My interpretation of the reason is the marketing and legal department driven integration. The OS and OE were integrated to destroy the competing DR DOS that was gaining some ground. IE was later integrated to dance around the restrictions on bundling (while destroying Netscape). Media player and messenger have recently been integrated to avoid the same bundling restrictions. Integrate too closely and you end up with unrelated components being dependent on each other, modifications to one component have cascade effects through the system causing hard to trace bugs.
I think that if Microsoft were to do as Apple has and use BSD as a base and put the OE for Windows on top while removing the packages that are integrated for marketing/legal avoidance reasons they would create a more stable, more flexible system. If they gave fixes back to the BSD community they would also go a long way towards making improvements to their image. But I don't believe they can due to ingrained arrogance and fear of losing stock value.
Yes it is a joke site. But this posting is not