According to the Owners Manual, it's got a 100W maximum. I have used it to power a small laptop computer. Read the power supply carefully to see how much input power it needs - many big widescreen laptops would draw too much power. I have also used it to power a wireless access point when I needed a temporary wireless network in the middle of a parking lot.
I keep a 25' extension cord in the truck along with a 3-prong to 2-prong converter. You never know when even a little AC power will be a handy thing.