There are a lot of open source mechanical keyboards out there and with a bit of elbow grease, anyone that is a little bit tech savvy can figure out how to link all the information together and do something with that.

However, the thing that stands out to me is the integration of all the parts.

Integration between hardware and firmware is a bitch, and add to that the mechanical integration as well. This dude hopefully has a bright future ahed of him, because he certainly has the chops.