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The latest Marvel movie to arrive on 4K Blu-ray gives us our first glimpse of the Black Panther's home world of Wakanda, after the character debuted in Captain America: Civil War. A huge hit at the box office, and an equally huge discussion point on social media due to its almost exclusive focus on black characters, it's ultimately a bit hit-and-miss from a simple filmmaking perspective.

Soundbars continue to be the home entertainment sound system of choice for most people. Even those with a serious multichannel setup may well have a soundbar in another room to bolster a TV without the fuss of amps and speakers. But not all claim to create a surround sound experience – a feature which tops the spec sheet of Samsung's HW-N650.

Twenty years since the start of UK digital broadcasting, some TV viewers have complained that certain terrestrial channels – BBC Four HD and BBC News 24 HD in particular – have gone AWOL.

Able to cast a 100in image from a distance of just 30cm, Optoma's HZ40UST projector has an eye on media rooms and living spaces where cable runs and ceiling installations are a no-go.