@IainB - Let's rephrase that quote you posted a tiny bit to make it more accurate:
When we started OneNote we (i.e. Microsoft) set out to revolutionize the way Microsoft can capture, annotate, and recall all the ideas, thoughts, snippets and plans in your life. As many of you have attested, OneNote is the ultimate extension for your brain, but it’s not complete if it’s not instantly available everywhere to Microsoft and its 'good friends' in government and business. We’ve already made a lot of progress in that direction with our mobile, tablet and online web experiences. But there was still a gap. People frequently asked us for OneNote on Mac, and Microsoft needed more ways to capture and analyse your content and share it with government entities and corporations to aid in their never-ending 'fishing expeditions' to idenntify potential dissidents and IP license violators - along with all the other businesses who pay us well for "targeted marketing data" which we mine from your information stores.
"If you ain't the customer - you're the product."
Macintosh users welcome! 
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-40hz
Exactly what I thought 40hz when I read the news.
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-phitsc
^^ Yes, eggsaggerly so. Me too. I have no illusions about MS' motivation. I can only recall a few instances instance of MS having really done anything for "FREE". There's arguably "No such thing as free lunch" with MS. Hooks all over the place. In marketing they are very often at best the iron fist in a velvet glove, but at worst they sometimes seem to omit even the glove.
Bit of a rant:--------------------------Google arguably have already overtaken MS to be the most innovative, inventive and smart marketing IT operation, and in the process they have introduced a lot of technology that has been disruptive/transformational - most of it successful/useful, some of it written off as failed ß experiments.
However, MS has a history of releasing product to grow/secure/consolidate market share and obliterate the competition, where doing something refreshingly disruptive/transformational seems to have been almost accidental. I don't intend that to mean that their products are not good - they are usually
very good - it just means that their products seem often to have been deliberately hamstrung to achieve just a
marketing objective - e.g., lock-in - and not necessarily major additional benefits to users. Like Apple, I suppose.
A good example might be the belated introduction of Power Pivot into Excel. This tremendously powerful tool automates a large part of complex cross-tabbing and data analysis of your data, which becomes much like a set of relational database tables. It has potentially bitten off a H-U-G-E chunk of the BI (Business Intelligence) market - but MS could probably have implemented this ages ago, if they had wanted, instead of stopping at just the chronic vlookup and Pivot Tables for as long as they did.
Another example could be Sticky Sorter (an Affinity Modelling tool) from MS Labs, now pretty much buried without trace. It even integrated with Excel for goodness' sake.
END of rant.--------------------------