My brother-in-law has a 3D printer and uses it a lot. He makes custom parts for his drones and random odds and ends (cookie cutters, bubble blowers, etc...). I once printed a replacement clasp for my fitbit which was pretty handy. I feel like I'd never use a 3D printer (unless I lose another fitbit clasp...), but if you're a "maker" with a hobby that can utilize it then it may get some use.
My kids are getting some gymnastics equipment for the basement. A bar and some mats. They both have android tablets that they use for school (mostly raz kids) which are pretty slow, we're thinking of upgrading those as well.