Yep, I'm still using a KDL-55W829. Great TV at the time, but now looking decidedly dated on a number of metrics, and the smart functionality started failing some time ago.
Looking forward to a new 4K set to go with VOD, 4K PC etc etc, and the Mrs has also come around to the idea, but going to look at next years sets I think rather than settle for this years, as ideally want something with all HDMI 2.1, and it seems like all the TV models for this year have issues here and there.
Next year might see some substantial upgrades, newer chipsets etc
Same with AVRs, as seems most of this year's units use a HDMI 2.1 chip which has issues with uncompressed 4K120...ala the Xbox, PS4 and PC /facepalm.
Fingers crossed next years kit is more refined!