It confuses me, too, but they also want me to have to find an alternative to their contacts, calendar, and push-email stuff when I get my next Windows Phone device, even though they're still going to be supporting Exchange syncing for paid Apps accounts.

The sad thing is that the alternative I use might just end up being a Google Apps account... :| so they'll get some money out of that, at least (I'm assuming the free one I have right now will have to be upgraded to get the sync support added back in).