in all reality, sooner or later Apple will "steal" all of the useful tweaks in Cydia. Let's be honest here, there is nothing original in Cydia. There are some great apps in there and I have gladly paid for a few of them, but their not original ideas. As another poster pointed out, wifi sync was around before cydia for other devices.
Every major update to iOS has seen the incorporation of a new feature that you would have previously needed an app for. Be it an app store or jailbreak app, either way Apple is slowly taking these ideas and making them standard features. The quicker the better, I say. I'd love to be able to get an iPhone one day and not feel the desire to jailbreak.