Not sure if it is “the closest” - have to ask someone more familiar with all the set top box offerings these days - but yes it’s a definitely viable alternative.
Not true! It has very native mouse support - just plug it into the USB port.
What I ran into was keyboard support - yes, it has native USB keyboard support, but the ones I have laying around don’t have all the spiffy volume and gaming keys, etc. But even with a plain USB keyboard, you can do most everything with a little study. A lot of “alt-Tab” and function key usage.
One limit may be the number of USB ports. Mine came with one USB 2 and one USB 3 port and I wanted to plug in a USB Fan, keyboard, mouse and thumb drive (to save video on). The easy way around this limit is a USB hub.
But the excellent reality is that many of them come with these nifty lighted cordless “keyboard - touchpad - game pad” combo devices. They have all the special keys and - once you get used to them - work great for controlling Android TV boxes, a Raspberry Pi, or just even regular PCs. If you can run a gamepad you can run one of these. They are much smaller than they look in the pictures!
The Android box I got supports microSD storage as well as USB 3 so you also have options there.
There’s a huge variety of Android TV boxes from $300 Nvidia Shield down to $40 hockey pucks. I have a hockey puck streaming a couple of cams to a elderly relative who knows how to open a web browser and not much else techwise. So others can better explain the wonders of owning a Shield and what you can do with it.
But before investing in anything, definitely play with tinyCam Free on any Android device - it makes a nice viewer just as a standalone app, but there are differences that you may not care for.
Here’s the stuff I used - you really only need the TV box unit to start with.
It was planned as a cheap-as-possible proof-of-concept but ended up working quite well. Anyhow, I will definitely buy a more powerful Android TV box for the next one.
Also you may need a long HDMI cable if you want to run it with a wired mouse & keyboard on the coffee table in front of you. But it comes with a short one for once you’re ready to leave the Android box up by the TV and run it with the wireless pad thingy.
Once it’s set up and running, it will run headless just fine and you can use the TV and HDMI cable for other tihings. And obviously you can use a regular HDMI monitor instead of a TV if you don’t need sound.
https://smile.amazon.com/gp/product/B07PX26M7C
If you need a spare
https://smile.amazon.com/gp/product/B06X9J8NG4
For cooling the hot running hockey puck - I strapped the puck on top of this
https://smile.amazon.com/gp/product/B07R3B3H28
Can never have too many USB ports
https://smile.amazon.com/gp/product/B072LW1RGG/