Here's the problem, though: while the PDK takes effect with Android 4.1, many device makers haven't even gotten up to Android 4.0 yet. Let's take Motorola, which you can be critical of because it's actually owned by Google. Motorola posts a handy-dandy chart of Android 4.0 upgrade status, where you'll find that many phones won't begin their upgrade rollouts until the third quarter of 2012, and many others will remain with Android 2.3 forever.

We've encountered this situation in my house. My kids' Acer tablets have been upgraded to 4.0, but my Toshiba tablet is still at 3.2. While 4.0 looks pretty slick, there have been a few glitches. For more, check out this PC Magazine story.