A solution to a non-existent problem?
I can turn my Android phone into a hotspot faster than I can type this sentence. Whether I'm in the car, at an airport, or walking down the street, it's always available and uses my existing network and my existing data pool. Why would I want to use another device, open another account, and hope that I use it in my car often enough to justify the additional data cost? The short answer is that I wouldn't. It would be interesting to see how all of those new GM car owners with WiFi Hotspots (also provided by AT&T) like the service and how much they are paying for it. I'm guessing this benefits AT&T a lot more than it benefits the car owners.