I fully agree with rodney, 16Gb Compact Flash card are now available, albeit, at a very expensive price, but my guess is you will buy memory chips for albums, the form factor will be tiny.
What I'm saying with this post, I'm aware of SACD2, but that although a threat to DVD-A, I think is less likely to happen then this hybrid disc if sony goes behind it because it will work with SACD and they will want people to buy SACD players and youngsters will happy with DD 5.1 & DTS 5.1 on the otherside with video. The fight between the format for me is about content at a target price of $15, and surely you need to give more than CD for people to switch over, at the age of MP3 people with revert back if the content is much greater, I've got an iPod and I only burn my own CDs @ 256kbps but that's only when I'm the move at home I would like higher res + more content than just the album may be.

I think if people get SACD or DVD-A with additional content, then people will buy it
audiophile will jump on it for the high rez and youngsters will jump on it for the video+ additional value offered.

not dual disc because it has the effect of shortening some album! the length of the music is constrained on DVD-A side because I don't think they found a way yet to have dual layer as well as CD on the otherside of the Disc and be compliant in thickness.