Why can't I have a flash of inspiration and invent the jillion dollar idea that will let me lounge around the house and watch basketball all day?
I think they're going to need more than some industrial knobs attached to the side of your car though. Like at least a hole in the back of the bag for all the poop you're going to scare out of your dog when he realizes he's been attached to the side of a car.
Granted, dogs love having their head out the window. I like to think that most dogs believe that they've suddenly learned how to run really, really fast.
Luckily, getting your dog into a sack is never a problem. Not like a fenderbender might be.
Quick, to the Dogmobile.
And remember, have your car spayed or neutered.