Josh Lowensohn of CNET writes:
"Sony's announcement of the PlayStation 3 Slim on Tuesday was no surprise for most gamers and industry experts. Parts that once cost a small fortune, such as hard drives, processors, and special disc-reading lenses, continue to fall in price and take up less space. It's only natural the machines that use them would shrink as well.
So is it normal to release a heavily revised version of a gaming system within three years of the initial release? It depends on who you are. Let's take a look at some notable shrinkage from the last three generations of consoles. I think that you'll notice a trend."