Another good thing about laptops is that they get less dust on them, because you can fold it together. So if you worry about overheating, you might want to get a laptop. Desktop computers have a lot of large holes in them, which suck dust in them, and it overheats the components, and you can't suck the dust with your vacuum cleaner or you'll destroy your computer. In laptops, the holes are so small so the dust can't get in so easily.
And if you like upgrading your computer, you might also want to get a laptop, because they're easier to upgrade. You just have to open a small hatch under the computer to put in some more RAM, kinda like switching a new SD card into your camera. But on a desktop computer, when you're upgrading RAM, you'll risk destroying expensive parts, like your GTX 690, because of static electricity. That's another reason desktop computers can get expensive. That's 1000$ lost in a few seconds. If you would lose 1000$ in every minute, that would already be 60000$ in an hour.
Desktop computers are dying:
http://www.the4thdimension.net/2010/12/are-desktop-computers-obsolete-or-dead.html
"Google Europe sales chief John Herlihy says that the Desktop computer will reach its end of life in 3 years"