This has always been my view of Microsoft’s tablet strength, and the competitors’ glaring weakness. For me, without a viable input method (and the onscreen keyboard is not a viable input method for anything more than 140 characters), existing tablets are nothing more than one-way consumption devices.
I, too, used slate tablets + OneNote for all of my note-taking. Not just in meetings, but when I was brainstorming, researching new ideas, collecting and annotating content from the Web, etc.
I have OneNote notebooks with every note I took from 2003 through 2008, all searchable, and all with me all the time. The only reason I stopped was because my slate tablet died a slow death, and all of the newer Tablet PCs I have tried are complete crap for handwriting (mostly because of the introduction of and focus on touch).
However, this is just me, and the way I work. As I discussed in a previous post, this is not the case for millennials (or however you want to label the up-and-coming generation). For my kids, handwriting is awkward and slow. They would much rather type things, even on smartphone keyboards, or onscreen keyboards. Writing is an absolute last resort. Look also at the fact that a number of education departments are now removing cursive writing from the curriculum. For better or worse, in the next generation, handwriting may become almost unknown.
So for Microsoft, Windows 8, tablets, and handwriting, it will ultimately come down to (as it almost always does) answering the question who is your target market?. If Microsoft is going after the same people who buy iPads, and Android slates, then handwriting may not be much of an advantage at all.
In fact, it may just make those people think “more old fashioned stuff from Microsoft”.