To answer the original poster, I just got 4.4.2 over the air yesterday afternoon on my Tab 3 7 Wifi only. What a surprise! I had given up on Samsung expecting they were just abandoning the 3 7. I know it's not a powerhouse, or even the greatest screen, and it's a bit laggy, but for me its wonderful.
But don't see much different...seems about the same as before. I admit I'm not up to date on what new features to expect. Can anyone point out what the new features are?