This is cool stuff and I wan that HUD, but I take pause with the following statement:

> With these two innovations, you would not need a certification course to dive safely.

There is a lot more to diver certification than learning how to control buoyancy and how to read your computer. You need to be comfortable breathing through your mouth, you have to know how to share air, you need to know how to configure and connect your equipment, what materials are appropriate for what kind of dive. You need experience with some trusted people. Most importantly, there's only one way to learn that spit and baby shampoo are the only useful defoggers for your goggles.