If you want to feel more secure when you travel with a laptop and also kind of want to feel like the guy that travels with the president with the nuclear codes handcuffed to his wrist, you'll probably love the Laptop Locker: a secure briefcase that requires a passcode to open, safely storing your laptop inside. When stationary, you can anchor it to any solid object to keep it from getting snatched.
It's the perfect way for you to feel important when you travel, even though we both know, in reality, you're not all that important. At least not important enough to keep your computer locked up in a case that looks like it could take a few bullets. But hey, image is everything, right?