Re: A taste of the future.
Jesting aside, my wife bought - on an impulse, on Prime Day - something called a BedJet a couple of years ago. It's basically a small under-bed fan heater / refrigerator, with a duct to direct the air under the bed's lower fitted sheet. Sounds like a gimmick, right? Well, that's what she thought & had immediate buyer's remorse, until one day out of curiousity she had me set it up on her bed.
Well, now she's hooked, and swears it's the best thing ever. When she gets cold - I'm choosing my words carefully, because I don't want to sound like a sexist pig, but she does seem to feel the cold a lot more at night, shivering even when I am passing out from heat - it'll blow carefully-temperature-monitored air straight up the bed from her feet onwards.
And no, it's not cloud- or subscription-based, we're not QUITE that daft, and it has both a physical remote control and a WiFi direct phone app.
Before that, the state-of-the-art in bed heating was a hot water bottle, or in extremis, me holding the covers up on the side and wafting a hair-dryer carefully up and down. This is apparently an unqualified improvement :)