Which won't happen until Intel is more willing to loosen their grip on Thunderbolt. With Thunderbolt, in order to even get in the door, you have to file an application to request to get into the development program which they promise to get back to you within three weeks in order to just get the datasheets needed to start designing. Conversely, protocols like PCIe and USB, you can get the chips, the datasheets, and development boards, with no signup process, just waiting a few days for the items to come in the mail. When you treat your customers like that, it's no surprise that the takeup on thunderbolt has been tepid.

Not to mention you can only buy controllers from intel, and we are talking $50+ a controller, its totally insane.

When my machine isn't portable, I'd much rather have my upgrades mounted inside a generously-sized case than a tiny one surrounded by a rat's nest of cables.