20% Annual RFID Growth in Automotive Predicted by Industry Week

Here's a glide ride you ought to like: The global RFID market in the automotive sector reached $312 million in 2005, according a report released by Venture Development Corp. on March 17. This market will see an annual growth rate of 20% through 2010, with revenue shipments projected to exceed $765 million within five years.

That's from this article in Industry Week.
A quick scan of the piece will give you a more grandular breakdown of the hardware versus software spending and the application areas that will be emphasized.