The screens usually have at least 1-2mm border around them, plus driving complexity will go over the roof. But it's a great tinkerers project - go for it! Sinc

The screens usually have at least 1-2mm border around them, plus driving complexity will go over the roof. But it's a great tinkerers project - go for it! Since our software allows tiling we've built some test large scale composite screens out of our 6" and 9" devices - I think maximum was around 25-50 screens combined in a big virtual surface, with resolution over 10k x 10k pixels. So sure, it can be done, but is a pain to setup and run.