iWorks for iOS

Just a question I had.

I am strongly considering purchasing the iWorks suite for my iPad (Pages, Numbers, and Keynote). The problem is that it's been about 2 years since these apps have been released for iOS. I can't imagine that these apps will be updated indefinitely. Eventually, they have to release new versions of these apps to bring in new revenue for such a core product, right? Just like they do for OS X.

So, do you think Apple will eventually release new versions of these apps that will require another purchase in the future? Or do you think I can purchase these apps now and always have the latest version as Apple continually and indefinitely updates them through the app store? Should I buy the iWorks suite today?