How long will a macbook pro last, if its used as a normal computer would be used?

I'm thinking of getting a macbook or most likely, a macbook pro. However, I use my laptops as normal computers. For example, I save all my pictures, documents, and everything to my laptop, but I do not play any games that would have to be downloaded or installed except maybe, The Sims. If anyone can give me an idea of how long both a macbook and macbook pro would last, that'd be great.

Tags: ,