Well it will definitely help out in the gross sales numbers, but since it will still be the most expensive console I think it won't change the fact that it's in third place (obviously it will beat 360 right after the pricecut, but in a month I think it will be back behind 360).
It's important to note that the potential customer will become increasingly more casual because hardcore gamers will already have one or more current gen syatems. This does benefit the cheapest (360) and hyped (Wii) systems.
Another thing is that more and more the focus will be on online gaming and in the most important market (US) much more people have a 360. If you want to game with your friends you'll need a 360 as well, despite missing on some awesome exclusives.
Increased sales will probably lead to more confidence of devs and publishers, which is extremely important.







