This article critiques the theatricality of MS's release process quite thoroughly and concludes that it is not the same as Apple's.
This is true, but nobody should give a crap.
What's important is that Windows 8, the surface, etc. are actually good.
Until Apple came along and turned computers into fashion accessories, brand image didn't matter so much. Now it clearly does. What the author ignores is that brand image is a product of many things, with press releases being only a small part for most companies (They are a somewhat larger part of Apple's brand). A long track record of high quality and innovative products coupled with clever advertising is what makes or breaks a brand like Apple's more than anything else.
Microsoft's brand is currently rather mediocre. Missteps over the last decade have really hurt it, but Windows 7 did go a long way to help it recover. Vista, as maligned as it was, was actually a really good OS saddled with some bad default settings (e.g. The overly obtrusive UAC). Windows 7 brought some minor innovations to the interface, greatly improved the default settings, and added a little bit of "cool" with details as subtle as just adding some unusually funky and artistic default backgrounds. Windows 7's default backgrounds made OSX look like the bland, boring corporate OS that Apple has long tried to brand Windows to be!
Movie studios often keep stinkers under strict wraps until opening weekend. If they advertise enough and prevent the film from being savaged by critics until the day of release they can still get a good opening weekend out of a poor film. Good films are frequently shown to critics or at film festivals well in advance of general release. This "festival route" builds word of mouth.
If MS had kept Windows 8 under wraps until a big press event this month and then hyped it as the most awesome thing ever, just like Apple does with their products, few people would likely believe them. By broadly distributing a release candidate for Windows 8 and showing the Surface publicly prior to release, MS took the "festival route" and built a big word-of-mouth effect. MS's brand isn't what Apple is, and they were smart enough to realize they have to do things differently, and did.