It is a possibility that it may rise in price, but it is just like a pre-order as in you will get it as soon as its released.
With digital games it usually involves being able to download the game a few days early so it is avaliable at 12 on the day its released
The prospect of getting the game a few days early is cool, but I'll be on Holiday around the time of the release anyway, so I think I'll leave it this time.
Do they charge you immediately or when they release it for download?