The Jireno Cube 4 sports an output resolution of Full HD (1920 x 1080 pixels), but the company says it can decode 4K videos. That’s not the same thing as projecting at 4K resolution, of course ...

And our favorite ultra-portable pocket-sized projector is the Anker Nebula Capsule II, which is the size of a Coke can and has a list price of $579.99 (about £465 / AU$830).

It's a portable projector with an unusual design that TCL calls the "magic cube": it's made of two rectangular sections, one of which twists to adjust the direction of your projection.