Philips Hue lights. I had wanted them for a little while for the novelty of it, but upon buying a couple my wife and I converted nearly all of our small apartment (except the bathrooms) to use their color-changing bulbs. Being able to change the light color and temperature has been surprisingly nice and has made our home much "cozier" under quarantine. We change the lights to dim reds and blues during movie nights or when we exercise or do yoga. It was a somewhat expensive shift, though I'd happily do it again. Being able to use Siri via our phones to control the lights by voice is also convenient as we head off to bed (as the light switches are across the room).
[Others have also said AirPods Pro. Spectacular little earbuds.]
[Others have also said AirPods Pro. Spectacular little earbuds.]