As a carpenter, the first thing I wonder about is dimensional stability. Wood expands and contracts with humidity and temperature, quite a lot more than people expect. How is that going to work on a precise object like a phone screen, or as a partially load bearing window? Not insurmountable, but very tricky stuff. In precise woodworking (fine furniture, marquetry, etc) dealing with wood movement is the main challenge and we have hundreds of years of work on the problem.