They often do that
Normal product development cycle for MS:
Version 1 - Build completely from scratch without knowledge or training. Usually makes a completely useless product.
Version 2 - Buy up a competitor with a working product which needs a relatively small amount of investment to turn it into a brilliant product as it's not really complete or stable. Replace all of competitor's logos on the product with MS equivalents and ship with some weird installation requirements that are irrelevant to the product (e.g. require installation of IE in order to run a route mapping program).
Version 3 - Re-write V2 from the ground up in order to produce a more MS-like experience for the end user. Remove any particularly useful or popular features, reproduce the bugs from V2 and introduce a couple of new ones that cripple vital features in subtle ways.
Version 3.1 - Fix any bugs that are driving customers to competitor's products. Create "Pro" version that includes all of the useful and popular functions that were removed at V3, but charge 5-10 times as much.
So....
Expect next year's glider to be purchased from someone who's glider worked this year, expect 2012's glider to have no wings and 2013's to work but also come with a version that has engines.
Also expect MS to loudly talk up how much innovation they have brought to the glider market.
Bitter? Me? No, of course not. Well, not much.