Thanks for everyone for the info given 
It has been a few days, but I did some more research into all of this, and there is a lot to chew on:
- Regarding Anrdoid x86 - I did try to install it and check it around. It could be a good one if it wasn´t for the massive version gap between today and their version. Also, I was a bit more interested in Android without Gapps part, but it seems x86 does have those as default (if someone knows a Lineage image for x86, please let me know). A weird part of x86 is just not working with ethernet, which is very strange, since regular android can work with ethernet adapters.
- As for Ubuntu Touch: from what I can gather, this is either a more abandoned project or there is some massive rework happening at this point but is not visible (I think is more abandoned, from what I saw in a few videos). I did try to check how exactly to have that on regular x86, but was unable to find much. Still, another development was done afterwards, which is the next point
- Lomiri: This seems to be a fork (or similar?) of what was from Ubuntu Touch. It can be installed on Debian, but from what I tried from a virtual machine, seems extremely green (or versions for other devices is just more polished, not sure here).
- Kde Big Plasma: for me this was the biggest surprise. After a 3rd look into this one, and contrary to whatever KDE Big Plasma say on their page, you CAN install it on Debian! And very functional from what I see.
Now for me the biggest things for Big Plasma is mostly understanding how exactly make Netflix or other stream service work on the tile system it has. But for me, this is by far the best one of the options.
Not sure when I can have more findings on this, but I can have more updates once I know more about this.