Much like Metal Gear Solid 4, Sony is looking for LittleBigPlanet to move consoles from the shelves because all types of gamers are going to want this title. Personally, the desire to want and the stronger feeling of need are two separate problems; everyone will want the game but many will need to buy a PlayStation 3 for MSRP.
Although the prices are slowly dropping for a PS3 unit, hardcore gamers are the ones that will rush out and spend a bundle of money for a console just to play one game. If not hardcore gamers, fans of the franchise (MGS4 for example) and LittleBigPlanet is still working on building a fan base for their new franchise.
The platformer LittleBigPlanet, for many, isn’t worth $399 plus the price of the game. That’s asking a lot, but Sony still thinks it can happen:
It’s going to be a hardware seller. Not only do you have the platforming experience that a lot of other games will have, you have this creativity that really is exclusive to LittleBigPlanet. (kotaku)
Would you run out and get a PS3 for LittleBigPlanet? I’m tempted, but that $399 barrier is truly a large obstacle to clear.

This year Microsoft believes they’ve got a heavy hitter lineup of titles starting around now until the end of the year including: Gears of War 2, Fable 2, Guitar Hero: World Tour, Rock Band 2 and Fallout 3. They’re also looking at Lips, their karaoke title with a casual appeal to bring on the sales figures this season.
So there you have it, the PlayStation 3‘s 80GB console is now the price of the PlayStation 3’s 40GB console, running in at $399.99. This is, in effect, a price drop to compete well with the Xbox 360 which is now going to be $349.99.