First off, Apple doesn’t really produce much in the way of software of their own anyways, and most of what they do have is of little interest to me.
Now, on the iOS side, I would like to see some sort of file manager that would allow me to rename stuff instead of having to delete it, change the one on my computer, and resync it.
On the OS X side, I would like to see something similar to WINE; something to run Windoze apps without Windoze or some sort of emulator like VMWare. Yeah, there are other things out there to allow for that, but I would like to see Apple take a stab at it.
For PCs, I would like to see versions of iTunes and Safari that work as well under Win7 as they does under OS X. If the OS X version has half the problems I’ve had with the Windoze versions then iTunes really is utter crap, and to date, I have yet to successfully run the Windows version of Safari on the last four PCs I’ve had using three different versions of Windows.