If you've been waiting to upgrade your TV and you don't need a 60" or 65" monster, there's two TVs on sale today that will get the job done for not a great deal of money.
First cab off the rank is Sony with their 49" KD-49X8000D 4K HDR TV. It's currently available through Sony direct for $1199, a $900 saving.
Most importantly for everyone here, the X8000D holds up well when gaming at 4K - and when gaming with HDR on. According to Rtings, the input latency at 4K is 35.3 ms. That drops to 33.2ms when playing at 4K with HDR (both at a refresh rate of 60Hz, in case you're interested). Those figures might seem fairly high for those used to the 1ms and 2ms quoted by PC monitors, but for a TV it's not too bad.
But it's not the only TV that's on sale today, and it's not the cheapest or fastest either. Over at JB Hi-Fi, you can grab the Samsung 6 series KU6000 55" 4K HDR TV for just under $1100.
The 55" and 65" Samsung models from last year had input lag of around 20-25ms when playing in 4K with HDR enabled. The KU6500 and KU6600 series are some of the best TVs you can get for 4K HDR gaming, once all the post-processing options are disabled, although curiously I found very little info on the KU6000 series specifically.
They're both decent all-round TVs. For some extra background, I asked Gizmodo's Campbell what he thought of the two and he suggested the Sony: it supports Android TV, which means you get Chromecast out of the gate without needing extra hardware. The X8000D also supports 10 bit colour depth for HDR, which gamers will get the most use out of. Either way, however, you're getting a decent deal.