I can certainly see driverless cars leading to longer commutes all else being equal. If you can workout, read a book, work on your laptop, watch tv, etc. while your car drives you to work, you probably will care a bit less about the time involved. All else will not be equal however. Nothing in this scenario alleviates concerns relating to gas prices, which are likely to be the dominant consideration for most people. Your driverless car might be better at sipping gas than you, but not by much.