One of the advantages of gaming, compared to other forms of entertainment, is that the technology flies forward leaps and bounds every few years. This means that every new generation of consoles far exceeds the technical capabilities of the previous, and every few years we are greeted with the equivalent of the jump from black and white television to color television. We get huge graphical updates that show the age of past-generation games.
This means that the classics become dated much faster they should. In the same way a young child wouldn’t appreciate Citizen Kane because of the lack of color, we find games nearly unplayable after they've reached their fifth birthday. There is a way to combat this epidemic, though, and many companies have already signed on.