Seiko didn't just create the world's first GPS watch, in doing so they may have just created the ultimate travel watch. Using a low power GPS receiver, the Astron ($1,900-$2,600) can display your local timezone automatically with just a press of the button. Right when you arrive at your destination, press the button and boom, the watch sets the local time, in fact, it can use GPS to set the time in any of the world's 39 official timezones.
It can also adjust daylight savings with one button press and because it has a perpetual calendar that is calibrated until the year 2100, so you'll have the exact date as well. As for battery life, the watch is solar powered so you'll never have to charge it. The watches will come in titanium or steel, both with ceramic bezels. Link