A 4-port USB-C hub, now priced at just $15. This is the perfect way to expand your phone or tablet. It's also compact, making ...

For example, an older 1080p60Hz TV receiving information from an HDMI 2.1 cable will still display images at 1080p60Hz, and a 4K60Hz TV will display 4K60Hz. The opposite is not true, however.

There are a few options. Belkin has the Ultra HD HDMI 2.1 Cable ($25) that can support 8K resolution, and Amazon sells several 8K HDMI cables from Monster ($37), Monoprice ($10), and others.