Is the 120Hz refresh rate worth it over a 60Hz TV?

Yes for gaming and sports. The 120Hz panel with VRR and ALLM gives smoother motion and lower lag on PS5 and Xbox Series X. For casual viewing a 60Hz set would look similar.

Does it support Dolby Vision?

No. Samsung backs HDR10+ instead, so Dolby Vision content plays in standard HDR10. If Dolby Vision matters, Hisense and TCL sets in this class support it.

How does it compare with Samsung's Neo QLED models?

Neo QLED uses Mini LED backlights with many more dimming zones, so it controls blooming better and gets brighter. The QN80F costs less and keeps the 120Hz panel and smart features.

Can I control it with Alexa?

Yes. It works with Alexa and Echo devices for voice control of power, volume and inputs, alongside Samsung's own Bixby and SmartThings.

The TV, a stand, a remote and the power cable. A wall mount and HDMI cables are not included.

Is 50 inches big enough for a living room?

It suits viewing distances of roughly 6 to 8 feet. For a large, bright living room with seating further back, a 55- or 65-inch set fills the wall better.