Yes I have 2 computers that I use for working on different tasks at the same time. On one computer I'm browsing websites such as this one and viewing twitter while on my other one I may be writing a blog post or doing some coding on a website.
Having 2 or 3 computers is very helpful to someone running websites or for those that do coding or have a need to get multiple things done.
It saves you from having to switch tabs and keeps you from slowing down one computer.