Sony has inbuilt apps, so you are limited to those apps..
Worst UI i have ever seen.
Bulky Remote is not quite friendly.
Active 3D
Samsung and Lg has better UI with tons of smart features..
I have recently seen new Samsung TV's and let me tell you they are very good in Specs, PQ and awesome new remote.
Only let down with Samsung TV's are Active 3D with flickering glasses...
Lg has new lineup to be released, few models are already in stores.. they look quite promising too.
I have seen LA 6200, priced at 66k it has a gr8 PQ.
LG is gr8 for IPS panel, Passive 3D (5 starts for 2D to 3D Depth control), Motion Control Remote, UI is good and other interesting features.
As all brands are launching their new TV Models, They will be in stores in less than a month.. So more you wait more options you get.
I personally suggest Samsung or LG.