There's adjustable frames with a regular mattress, these just raise your head and feet. You can put about any mattress on these.
Smart beds are air springs that allow you to adjust a baseline firmness. As you move around in your sleep, it senses pressure points and adjusts firmness. We only got the passive cooling one, but some (Like Aire's) sense body temperature and heat or cool. They monitor your sleep patterns, heartbeat, etc - not sure if it does any adjustment for those but it will tell you how you slept so you can make your own adjustments.
Put that on an adjustable base and you get a smart AND adjustable bed.
I have to figure out how to connect it to my smart home stuff. A simple "good night", shuts down the house, locks doors, turns on cameras, turns off the TV, then changes the bed position and firmness from TV to sleep mode.