In Google's winter cleaning exercise, the company dropped consumer support for Google Sync, which allows access to Gmail, calendar and contacts via Microsoft's Exchange ActiveSync.
Here's the overview (emphasis added).
With the recent launch of CardDAV, Google now offers similar access via IMAP, CalDAV and CardDAV, making it possible to build a seamless sync experience using open protocols. Starting January 30, 2013, consumers won't be able to set up new devices using Google Sync; however, existing Google Sync connections will continue to function. Google Sync will continue to be fully supported for Google Apps for Business, Government and Education. Users of those products are unaffected by this announcement.
That last part, however, is critical. Google wasn't going to screw businesses by dropping ActiveSync.
In the end, Google is making it clear that if you want ActiveSync you're going to need a business account.