Samsung 8 Series smart TV 2012 vs. 2013

So, besides the design (which improved a lot), what is so different between the series 8 smart tv's from this year and last year.

I have 2012 model, and i'm curious if there even is a reason for me to upgrade to the 2013 model (ignoring the upgrade kit option).

2012 series 8:

Main-visual_medium


2013: Main-visual_medium