The division Google X, which is engaged in experimental development, is currently working on a modular display. Efforts of engineers focused on creating small displays, which could be combined together to form a large-sized screen.
The project is headed by former MIT professor Mary Lou Jepsen. As noted, the main problem of modular screen will be the software that allows you to play a seamless image.
Incidentally, Google X projects focus on innovation rather than the possibility of commercial gain.