Is that your car or an entertainment center on wheels?

Cars aren't just cars anymore. They are entertainment centers on wheels. According to Reuters, we can expect even more goodies inside automobiles in the near future. See the news story: "Microsoft, Siemens to develop in-car infotainment."

Here are a couple snippets from the article:

The rise of portable media players and content downloadable from the Internet is forcing carmakers and their suppliers to rethink their offerings, which have until recently centered on standalone audio systems.

The companies said their first milestone would be a multimedia platform that would make it possible to integrate consumer-electronic functions and portable devices.

Sure, I've seen GPS systems and portable DVD players, but the world of consumer electronics and portable devices is incredibly large. If you could customize the inside of your vehicle, what gadgets would you be sure to include?