We produce very large traffic management systems. I don't see MS on that turf, ever. If for no other reason than legal liability. MS have never produced a piece of software that exposes them to more than $5 or the cost of the product, whichever is the lower....they'd *accept* any legal liability? They'll just put their standard EULA-disclaimer on it, and sell it anyway!
You think they *won't*, once they own EVERYTHING else?!?
Who buys your stuff -- city councils, entities like that, right? And what are they made up of? Civil servants, trustees, ex-engineers -- in short, PHBs, that's who! That, and -- even worse! -- politicians. You think they *won't* be just the folks to fall for the shiny happy chrome-laden GUI message from Redmond?!? That'd be a first...
Doesn't Microsoft already own the OS you run the management console (or whatever you call it) on? ("Windows ain't done 'til [insert application here] don't run!" ring any bells?) And, once they've beat out the last OS competition on the server side, so they own the OS you run your main application on ("Windows ain't done 'til...") -- you'll *still* think "They'll never..."? Sheesh, man; can you spell 'naive'?
Well, good luck to you anyway... You're gonna need it.