It's a small, limited promotion defined by the fact that you can't actually order yourself a Tesla. Instead, if you're looking for a ride in Shanghai's inner ring on Wednesday, you can hope that one of the "few super-secret Teslas on the system" will come and pick you and up to three friends up. What's completely different about this Uber ride is that it's not a ride at all. Instead, if you have your drivers license, you can get behind the wheel and driver for up to 15 minutes.
CNET says that this is only the first of more Tesla-Uber promotions. Tesla is supplying the vehicles and a spokesperson said it was, "only a pilot test at the moment."