Do We Need 4G in Our Cars?

Audi and Alcatel recently demoed a 2011 Audi A8 with 4G. Seriously. They drove around and video conferenced with people in other cars to show off their crisp and mobile LTE connection (they got 30Mbps, real users can expect 5Mbps) that undoubtedly delivered clean video. Cool, I guess, but it begs the question: What the heck is 4G doing in our cars anyway?

Would you guys want a car with 4G? My thinking is that though it'd be nice to fall back on internet in your car (and its ability to hotspot other devices), car interfaces aren't exactly known for friendly user experiences. Shoddy UI is shoddy UI even if you add four gees. But! If the 4G came with no monthly fees, than I could probably be talked into it. Smartphones are our everything device, having other internet connected devices at our disposal lessens their load. But but! What would we use the 4G for? Facebook status updates? Google Earth? Would we really video conference?

So what do you guys think? Do we need 4G in our cars? Or is it a far and off luxury that would just clog up the pipes and wouldn't really be used?