Let me start by saying I have a nice bike. It's a Trek Madone, and it's probably more than my cycling ability warrants. But when you ride a week-long bike tour, you find yourself among all kinds of riders with all kinds of bikes. And some of them are really nice bikes! There are riders of every size, shape, age and gender.
CRMBT, I noticed a number of bike with electronic shifting, including Stefan's new Wilier. I told him he didn't need a faster bike, he already flies by my at some point during each day and yells a quick, "Hi Jeff". Stefan pointed out that with a touch of a button the shifter puts you in the next gear. If you're descending and want to go up several gears you just hold the button a little longer. It never needs adjusting, and the chain never rubs against the derailleur.
I also noticed a trend towards road bikes with disc brakes. One rider told me he'd blown several tires by over-heating his rims on descents in the Boulder area, so opted for disc brakes on his new Seven.