Seems to me now would be the best time to position USB 3.0 as the new standard interconnect for everything. DisplayLink is already a USB technology, and USB is already the default connection for every external device imaginable, and some that aren't!
I 2-3 years, I envision tower computers with a scarcity of cabling. Hard drives will be gone; in their place will be multiple SSDs. All those SSDs will exist on their own USB3 channel, with power AND data handled over the single thin USB cable. Just 2 SSDs in a RAID 0, and the average user has access to 800 MB/sec of transfer to their 1 TB of storage. Power users with 4 SSDs in a RAID 0 will have 1.6 GB/sec of read and write to their 8 TB of storage capacity.
And because of the bandwidth available, internal and external cards will both sport the same connector. PCI will be a memory, and PCI Express will be for 3D cards only. Add-on sound cards, network cards, TV and convergence technologies, and everything else will also be USB-based.
In short, USB will take over the world, were it not for one salient fact: USB 3.0 is *still* a host-based technology, and as such will still require the CPU to do some of the processing work in moving the data.
Long live Firewire 3200!