Is the LG 75B good for gaming?

It handles casual gaming, but the 60Hz panel and lack of HDMI 2.1 mean no 4K at 120Hz and no variable refresh rate. Serious console players should look at a 120Hz set.

How does Mini LED differ from regular LED on this TV?

Mini LED uses many smaller LEDs behind the screen, so bright scenes pop and dark scenes hold up better than on LG's standard LED TVs. It is not the same as OLED, which turns pixels off individually.

Does it support Dolby Vision?

The listed HDR formats are HDR10 and HLG, so Dolby Vision is not part of the spec here. Check the set's own menu before relying on it for Dolby Vision content.

You get the TV, its stand, a remote and the power cable. HDMI cables are not usually included, so plan for one if you are wall-mounting or connecting a console.

Is 50 inches big enough for a living room?

It suits bedrooms, dens and smaller rooms at roughly 6 to 8 feet viewing distance. For a large living room, a 55- or 65-inch set gives a more immersive picture.

Does it work with a soundbar over Bluetooth?

Yes, Bluetooth is built in, so you can pair wireless headphones or a compatible speaker. For a soundbar, HDMI or optical usually gives a more stable connection.