I believe this project is intended to be more of a 'design fiction' than a functioning photosynthetic material (RCA is well known for this type of work). Of course free organelles that aren't maintained by the cellular machinery will rapidly cease to function. They will maintain their green color but won't be able to perform membrane/macromolecule repair, gradient regulation, signaling, foreign body defense, etc.

This is still a useful project however as it may serve to catalyze future research into robust photosynthetic materials.