Most people purchasing a PS3 know of the Sony brand and were probably big fans of the PS2. With that said, I don't think most people who purchase it will care. However, $400 is still a lot of money and Sony isn't bundling anything with this, so you're still looking at $500 when you're done which is still stupidly expensive.
Sure it'll move consoles, but people need to think logically about this. It ain't about to save Sony from what they've done to themselves.