Is the Sony K-85XR50 worth it over the Bravia 7?

The XR50 costs less and still offers Mini-LED, 4K and Google TV. The Bravia 7 is brighter with more dimming zones, so pick it if HDR punch matters more than value.

Does the K-85XR50 support 4K at 120Hz for gaming?

Yes, it has HDMI 2.1 inputs that support 4K at 120Hz and variable refresh rate for current consoles and PCs. Check that your console and cable support the same mode.

What operating system does this TV use?

It runs Google TV, with the Google Play store, Chromecast built-in and voice search through the remote. Major streaming apps are available.

How many HDMI ports does it have?

It has four HDMI inputs, and two support the higher-bandwidth HDMI 2.1 features. That is enough for a console, a soundbar and two streaming devices.

Is an 85-inch TV too big for a normal living room?

At 85 inches it needs a wide wall and roughly 9 to 11 feet of viewing distance for comfortable 4K viewing. Measure the wall and the path for delivery before buying.

Does it come with a stand?

Yes, a tabletop stand is included, along with the remote and power cable. The panel is heavy, so use a sturdy surface or a wall mount rated for its size.