BMW unveiled a new concept car at the Consumer Electronics Show in Vegas, and the whole thing changes colors at the push of a button.  How is that possible?  Instead of paint, the entire SUV is covered in the same “digital paper” they use in Kindle e-readers.  We like the fact that you can make it “flash” if you can’t find your car in the parking lot!  Do you think it’s a good idea?  Would you pay extra to have a car that changes color?