All this centralised server business reminds me of Aquinas from Deus Ex, a huge mainframe designed to monitor all information on the internet under the pretense of catching 'terrorists' and giving the end user more bandwith.
Someone will make a crack or info disruptor at some point. Knowing Microsoft, it will pretty easy to do. Also, if need be I will never connect to the internet, until I have backed up sensitive files and deleted the originals. By sensitive files, I mean anything that could be used to send targeted advertisements to me or anything quasi-legal (burners etc.).
In the end, this will boil down to wasted money and increased suspicion of corporations. I recommend everyone play Deus Ex sometime; bear in mind it was made BEFORE 9/11.
This is not good.