Well, some of these supposed new ideas have actually come, and occasionally gone too! For instance, we used to have a combined Verizon Wireless account for our 3G cell phones and for OnStar, but someone, either OnStar or Verizon, decided to quit that plan. Separate bills now.
By the way, I'm not sure what people assume when they hear about OnStar, but it's more than just getting an operator in an emergency. Aside from telephone, emergency, and directions to a destination, it also monitors multiple onboard systems and provides you with a status report every so often. Certainly, such functionality can only increase over time, yes? More on-board sensors, for ever more remote diagnostics. This can already be done in real time, if they choose to do so. Whether it continues to be called "OnStar," or some other fancy moniker.
Also, 3G and even 2G networks can also "allow for multiple data streams to happen at the same time," as far as that goes.
Moving targets are great for systems engineers or any other kind of engineer. Keeps you on your toes, and never a dull moment.
Take a look at the 2013 Motor Trend car of the year if you want to see the best Silicon Valley can do in infotainment, comms, diagnostics and car configuration. Nobody's done anything like Tesla''s 17" console in a production vehicle.