Vivi, it looks nice. It seems a bit too small to be cost effective; people may not want to pay that much to grow a couple plants.
Some people pay quite a bit for something like this:
It is almost the cost of the cheapest professional growth chamber (i.e., Percival).
I think computer based control is easier than the control on the box. I'm guessing that R-pi is running a web server and interfacing through web browser? Just like OpenHAB home automation or something like that? The problem could be the long term support. If it is using some non-standard method (or non-open source software), people may not be able to control the box once your companies stop operating (or drop the support).
Camera seems to be wasteful although I'm not sure what it does. You mentioned that the camera can be used for photosynthesis. It isn't measuring chlorophyll fluorescent (fluorometers), is it? If it were the camera which can measure the leaf temp, it might be interesting to control light/temp from the measurement. Public Lab: Near-Infrared Camera
Anyway, it looks like an interesting product.