Sounds to me that you just described the format of a BlackBerry!
I could almost envision a clip-on (or magnetic?) keyboard that sits on top of your screen when you need it. Perhaps it could be taken off and stored on the back of your phone, much like a MagSafe battery on an iPhone.
I like the magnetically attachable kb idea A LOT. Could also attach to the back of the phone when not in use to not live as a separate part. Seems like it'd be a pain in the ass to spend multiple seconds mounting the kb every time you need to type but I would actually keep it mounted and take it off when watching videos only. So it'd remain there for 95% of the tkme.
That could work too. A keyboard that you put on top of the screen, the only thing that would need to happen is that the operating system detects this and moves the content to the top, the same way as the software keyboard.
This looks awesome, and they even mentioned that they were faster on the physicial keyboard. Although this design also has the problem with balance, but very likely not as much as TFA. I guess this design can't really work today as there is no home key on phones anymore, which they covered with the keyboard so it is not as long as the case in TFA.
I just found this galaxy keyboard cover for the S8 and the phone really adjusted to the keyboard being there, this looks like the perfect solution. Why did they stop manufacturing this for their new phones :/ Someone in the reviews also mentioned that they borked it with a Software Update.
I could almost envision a clip-on (or magnetic?) keyboard that sits on top of your screen when you need it. Perhaps it could be taken off and stored on the back of your phone, much like a MagSafe battery on an iPhone.