I've read that there are no major differences to the actual picture.. but what they do do is lock down the TV so that you can't install alternative firmware releases like SamyGo (which has made some great progress, like adding a built-in web browser). It also means you'll not be able to downgrade to previous releases which is really bad news if you're not happy with the latest firmware.

I for one won't be crippling my TV with this firmware!!