Does it work well if I wall-mount the soundbar?

Yes. Sensors detect whether the bar is flat on a table or mounted flush to a wall and recalibrate the speaker direction automatically, so Atmos effects are aimed correctly either way.

Do the rear speakers need wires to the soundbar?

The rear speakers connect wirelessly to the system, but each still needs its own power outlet. Plan for power at the back of the room.

Is a separate subwoofer included?

Yes. The package is 5.1.2 channels with a wireless subwoofer, so bass comes from a dedicated unit rather than the bar alone.

How does it compare with a single-box Atmos bar?

A single bar simulates rear and height channels. This system uses actual rear speakers plus up-firing height channels, which gives more convincing surround at the cost of extra speakers and power points.

Is it good for dialogue in TV shows?

Samsung tunes it for clear center dialogue, which helps with dramas and thrillers. You can also raise the center channel level if voices still get lost under effects.