I am not sure what the benefit of thunderbolt is if you need this:
Having a breakoutbox will still cause a bit of a mess, the ideal solution will be having thunderbolt ports on every device such as Monitor, Hard Drive, Dac etc. It has become ridiculous having three monitor standards such as HDMI, DVI and Display Port.
I am currently enjoying a bluetooth mouse, but no bluetooth keyboard as it was too expensive, anything with Bluetooth adds such a huge cost to a device.
I think having a really fast wifi for a hard drive would be better than using thunderbolt. Also if the iphone & ipod touch could sync over wifi, that would also reduce the cable clutter.