The chances of you having both Google Glass and a Tesla are not very high, but in case you do, I have two good news for you.
The first good news is that you have both Glass and a Tesla, but you already knew that, so I'll just focus on the second news.
Tesla is releasing a glassware called GLASSTESLA which despite not having most creative name allows you to control an incredible amount of stuff on your car, making your awesome Tesla even more awesome-er (yes, I said awesome-er)
Here's the list can do for you, directly from Sahas Katta, the developer of the GLASSTESLA app:
View vehicle charging status. Start or stop charging via Glass. You can even open the charge port without having to get back into your car.
Locate your Model S on a map and get directions to it. You can even honk the horns or flash the headlights if you still can't spot it.
See whether the doors, trunks, or sunroof is open/closed. Of course, you can lock or unlock your car remotely and even control the sunroof too.
You can view the car's interior and exterior temperatures. With a single tap, you can enable "auto climate" to either cool or heat your vehicle to an optimal temperature remotely.
Katta says he can access some more data like the car's compass, but he can't do anything with it yet, on the Tesla side, the car limits how much can you interact with it while driving, like you won't be able to honk the horn or flash the light, and on the Glass side, he says that Google Glass doesn't have an API for real-time speed and can only fetch static data.
Let's remember that Google Glass is still in its very early stages, only limited to a few thousand people who are helping Google to determine what's the best use for the device and how to handle it.
You can download the app from its website and if you can, make a video of yourself using it and send it to us, so we can marvel at you and give you some sort of Tony Stark Award or something like that. Seriously, what are you doing still here? go play with you Glass/Tesla combo!