There's a lot of discussion about technology within the future volt and what should be included and not included.
On this front I would like to see multiple input options for MP3 playback through the stereo. Most people have iPod's and want a input jack or maybe a PAL (Personal Audio Link) set up. PAL is a GM plug in device that you connect your iPod to which charges it and allows for the user to use the radio and steering wheel controls as well as to see the song displays on the existing radio display. I believe this is new in a few GM vehicles right now (I know my current GM ride has this option.)
I personally would like to see a USB interface and a universal 5,7 or 9 in one storage card reader slot. I store much of my music and even videos on such cards and if the volt came with a in dash screen it would be nice to be able to pull a card out of a digital camera and view the pictures on the screen.