The Wii in many ways can be compared to the PS2. I'd say 6 years. The better question is how long the PS3 will last. In 5 years Microsoft will have a new console that will surpass the PS3, and probably be drastically cheaper. I know Sony brags about the power of their console, but currently PCs are more powerful than the PS3. Go buy a Nvidia 8800 if you want proof. It's godly.