Sony is perhaps doing the most condeming thing to the PS3. They are making a new, cheaper version of a PS2. Microsoft avoided such a problem by stopping production of the Xbox, forcing people to buy the superior 360. Yes the PS2 is the best console ever made, but if Sony wants to move on they can't let the PS3 live in it's shadow. It's only going to hurt them long term. Gamers aren't super rich, they buy a console they normally stick with it for a few years. Sony's price drop is welcomed, but a continuation of their PS2 is harming them. It still is the fastest selling console on the market.
Sony can't afford to gain a base of gamers 2-3 years from now. In 4-5 years they will start announcing the new next gen console for the 360, Wii or whatever else. Heck they may announce the PS4 by then too. Someone will release a next gen console in 4-5 years. Count on it.