It obviously wouldn't be at the forefront of technology as it is now, but would it still be suitable for most tasks like surfing the web or video and pictures?
Does that old Windows 98 PC you have in your closet still run Word? Or how about that old iMac G3 running Mac OS 9 that you just gave to your little sister? All those machines are old but they still work exactly the same as the day you bought them (OK, well maybe not depending on the status of spyware and viruses). Yes, any computer bought now will be outclassed in 3 or 4 years, but you can still use it. I plan to keep my MacBook as my machine for about 5-7 years.