This jailbreak and all the random assortment of applications and mods is probably the best thing that could have ever happened to the iPhone/touch. It keeps Apple on their toes with the damn device.
Without all these mods, Apple, being the idiotic company that they can be, will just leave the device the way it is for the rest of its lifecycle. But now that people are getting unauthorized applications (and enabling the calendar edit function again), it'll probably get Apple to release updates for the device.