What's good in TVs these days?? are 3D TVs still a thing? :p

Been sticking it out with my 9 year old 'HD ready' 40 inch plasma.... but it has finally bitten the dust!
Turning itself off, on , off, on... eventually stays off...
Googling indicates it 'could be a failed capacitor' but... 'most likely not worth the $ or effort to repair'
So finally back on the market for a new TV :)

Some starting points:

-bigger than 40'', probably 55...
-but under $1k would be nice... happy to go above if it is justifiable, i.e. good value for quality.
-4K for future proofing, longevity

I've been looking forward to having a 'smart tv' finally. Just nicer UX inbuilt apps like netflix, bein sports/spark sport, skygo etc. that avoid switching between devices.
But saying that, I would also be happy to get a quality dumb screen if it saves money to pay for a good dongle/box such as roku etc. with a snappy and usable UX
Oh, bit of a stretch, but DVR recording functionality would be a nice bonus for the months I have to stand down from the Sky deal 😆 

Current entertainment centre contains: Soundbar, Sky box, Apple tv 2, windows NUC, Nintendo Switch and Xbox one. All controlled by a harmony hub remote.

And finally, should I wait for a decent sale? (Rugby world cup year, but October is a bit too long to wait...)