Just packed the Panasonic to send it back and got a Samsung delivered here.

For starters the Panasonic one is a lot heavier and Samsung made it a lot easier to unpack/pack by using some smart support for the TV that allows me to take it out of the box and attach the pedestal without having to worry about it falling when sliding out.

Haven't started the Samsung yet - the screws aren't here (previous reviewer lost them?) so have to wait for some new ones.

The Panasonic picture is incredible and manage to stream some 4K content using their UltraHD app - even over WiFi 5GHz it was flawless. Be warned though: ADSL2 won't cut it. Tried with a Snap connection and it was buffering all the way every few seconds, but when connected via my Vodafone cable connection playback was smooth (I can only get ADSL2 here since we have cable in this area meaning no VDSL in the future and fibre is a couple of years away).

Anyway, liked the Panasonic controls. The TV was responsive and the number of connections was pretty good - including multiple USB ports. Let's see how a curved one compares.