Yes, that will not look out of place in a room, lots of people have day beds like this especially in a spare room.
I'd have looked into this, but would be real wierd in any of my bedrooms as all them are designed with the bed in the middle of a longer wall so there is space for end tables on each side of the bed, and there is polugins and wiring there for phones (Have a commercial pbx on the property with 32 extensions and 4 land lines).
I'd at this point in my life have an issue getting in anything with a tall side as not that mobile to be climbing and not getting hurt or falling, so i use my regular king bed, but it has the segufix on it 100% of the time. Which i just fold to the one side if i'm just watching tv or on the ipad in bed, and the two straps dont bother me as under smal of my back and down by my ankles, and the sink into the memory foam quite a bit also, so not in the way.
But as a way to get a bed with sides it looks like a viable option.
The alibaba one looks intresting, i wonder if that is re3ally meant as and AB bed or if they expect that to go into a daycare or something, seems a bit over the top for a daycare or hospital for sure. But overall looks cute.
I know a few years ago when working with my sleep doctor, she recomended a medical bed that had a top on it, and was more a metal jailcell than a bed to my eye.
I considered the metal bed and IIRC it was from a company called hard, which i laughed about as its metal, but it was metal sides and there was an additional top on it and had a full size matress in it.
Then she sugested this bed that was like soft mesh all around it, but the insurance said it was not approved, somthing about causing injuries.
So, then she sugested just using bed restraints, as i have overnight staff anyhow, so she sent through and i looked at them and were a bit intense looking being leather, anyhow i found the segufix ones, being all white and fabric and lined with soft material they looked comfortable and looked less bondage gear (which i've had experiance with and have some old black leather stuff from the ex still in the closet, but was NOT comfortable), so i had her put through for the segufix and my insurance covered most of it under DME so not sure when i can get a replacement again (albeit i quit seeing that dr for a totoally differant reason), and got the stuff but 1/2 came with the green locks and 1/2 with the black locks, which i decided to just deal with as it's a total pain with insurance and stuff.
But back onto topic.
If all your looking for is to be kept in bed, the segufix system harness will do that 100% without fail!!!
You only need the 1 strap on the bed and the man belt with crotch strap and shoulder harness to be 100% in bed for sure.
You can roll over on both sides (or be restrained from doing so, or even kept on one side) hands and feet are unrestricted and I dont even think of it being on and when i wake up often forget until trying to get out of bed, its actually very comfortable.
So, if your looking for something not exactly crib looking but something to keep you from falling out of bed the segufix might be a good option.