The all-in, one PC is actually pretty cool. It’s called all in one because the tower, CPU, etc is all built into the screen. This is quite handy because you don’t have all sorts of wires or other crap. It makes the PC semi portable
The touchscreen is more a “nice to have” than a “must have” feature. It’s great for things like sorting pictures as you can move them around, resize, rotate, delete, etc much faster an easier than using a mouse. It also is pretty nice as a family type PC near the kitchen.
It’s semi-portable. And you can add in a TV card so it is an over the air TV as well. I throw it in the trunk with the rest of the luggage when the family goes on a trip. Then I’ve got a nice big screen PC and second TV in the hotel.
As mentioned above, my autistic daughter LOVES it. She can’t use a mouse but the whole world of PC’s is opened up for her.
20 inch touch screen all in one PC’s start from around 600 dollars, so it’s not much more than a similar desktop with the same size screen. I think the cheaper iMac starts from $1500