So you are saying Apple would rather leave the MacBook Pro's update so people pay $499 for the base iPad, instead of $1199+ for a MacBook Pro?
No, it's called not releasing all your products at once so you can have them likely to buy both.
As much as it would be awesome for Apple to release an iPhone update, an iPod update, new MBP and iPad all in the same month, they won't do it to maximize their profits.