Cocoa is an API which can be used with either Objective-C or Java. Since the Symbian OS already Runs Java programs
If they're rushing to Market, developing Embedded Darwin would take much too long. The iPods don't run any variety of Darwin, and Symbian would fit thier needs in the interim.
My Firewire Scratch Disk for DV is only 20GB and can hold two or three miniDV tapes worth of Data. I can edit that much data on my 30GB iBook, without a Scratch Disk, but it's not pretty. (fragmentation, limited Swap space, slow Video, having to delete Excess Clips in order to Encode a Finished Product). A 50GB or 60GB Portable Storage Device, which doubles as a PDA would be perfect, and by the time this product comes to Market, (a few weeks before the release of Longhorn, for instance) miniHDDs will have that capacity.
With the increase in Data storage of the miniHDDs, that is likely to happen over the next two years, following Moores Law, Hitachi are going to have to find other ways of selling miniHDDs. Apple will have to develop a new use for iPod-type devices. How many people do you know with a 50GB Music Collection? DV and Photography will be the obvious Market, and would be able to make use of the existing iApps (iMovie, FCP and iPhoto), and further Promote the Macintosh Platform. Limited Support for the Windows Platform will follow on from iTunes for Windows, and make further use of Quicktime for Windows.
Apple could capitalize on the fact that PC users would be having to update thier Computers to Run Longhorn. They'll also be having to update Photoshop or whatever Video Editing Program to support 64Bit Processing, and also thier Creative Process so they can adapt to the changes bought on by Longhorn.
If they had to fork out $5000 for a new Computer, would they buy a Dual Itanium-4.0GHz with Longhorn or a Dual G5-4.0GHz PowerMac with MacOS X.5. In this situation, the Apple Computer would be Cheaper than the WIntel Computer.
The device would be targetted at the Professional (or Wanabe Pro) Digital Artists, not just as a PDA but also as a Personal Storage Device. It'll be not much larger than an iPod, and will have a colour touchscreen. The Touchscreen will double as an iPod wheel in Apps like mini-iTunes, mini-iPhoto and mini-QuickTime. It'll behave like a traditional Touchscreen in AddressBook, mini-iCal and any other Traditional PDA Apps.