A Tesla bought today does have the hardware to implement what they call full self driving, once the software is ready and state regulations, if any, are in place.

That being said, i would imagine said hardware would evolve over time with new releases. It would be nice, and probably safer, if cars could actually communicate with each other, rather than have to rely on their own cameras, to determine another vehicles position. Same with traffic lights, road signs, etc.

that's probably a long way off, although i wonder if Teslas have hardware that would allow them to communicate with one another.