I don't know.. for $1000 MSRP you can get this Alpine unit:
With a detachable harddrive, and I wouldn't be surpised if you could control it with the touchscreen motorized video systems. The retail market is catching up.. headunits with harddrives are showing up.
I wouldn't be surpised if with-in 2-3 years, displays popped up with all in 1 GPS, DVD, harddrive touchscreen video.. etc. Came up all fitting (external devices HD, GPS) in a normal 1 Din case.
There is really two things behind this new BMW/Apple campaign.
First, its a convience factor. Being able to be all snooty in your BMW while using your lavous ipod.
Second, its a status factor. Being able to use your lavous ipod with your BMW.
Apple's advertising is unbelieveably great. Yes I can admit, I have fallen victim to their ads and I am a proud owner of a 40gb ipod. It's quite disturbing how many more people you notice with those white in-ear headphones walking around when you own one. It's odd because, I feel like in I'm so secret cult or something. Whenever I walk by someone we just give that glance to each other like "I know, I am a user also" and give a slight nod.
All it is for new BMW owner's is more status.
And now I end my nonsense rambling that I refuse to spellcheck or read over for grammatical errors.