When I hear "blue" in an IT context the association I have is with "Big Blue", i.e. IBM. MS isn't "blue", it's "Azure", surely ?
It'll be interesting to see how MS holds on to it's revenue stream. My view is that they'll hold onto the business customers for Windows / Office in a single word: Excel. Every business outfit I know has lots of stuff on Excel that's been around donkeys. No one really knows how it does what it does & no one in their right mind would risk their job by suggesting an alternative. It's easier, cheaper & less livelihood threatening simply to pay MS's rental fees. The overwhelming majority of users neither know nor care what OS / software they're using, they just want it to work the way it did last week & no changes, thank you very much. That's a heavy inertial load in favour of MS in business for the foreseeable future.
Outside of business, there doesn't seem to be much reason to pay MS's increasingly hiked-up charges. XP still works just fine, & MS are asking £190 for W8, way more than Apple ask for OSX. Old versions of Office also work just fine & the latest versions (home & student) have had their price hacked up from £80 for 3 licences to £109 for a single licence. Unless you need or are required to use Office then Google's "Drive", at a purchase cost of zero, and a maintenance cost also of zero, seem very attractive. And, being cloud-based, it's got automatic backup built in, which means you don't need to wrestle with Windows Backup. Or as is often suggested Libre / Open Office might be worth looking at (can't say I was too enamoured of it myself when last I tried it, but that was some time ago).
I reckon that for the first time for years MS have a real fight on their hands. It'll be interesting to see how, or if, they can effectively respond.