A Standard for External PCI Express

PCI-SIG, the group which defined the PCI Express standard, published specifications for the fabrication of an cable which can transfer a PCI Express bus outside of a computer.
This standard is compatible with PCI-Express 1x to 16x.
The specific data on this standard is reserved for members of the consortium, so we still don't know the thickness nor maximum length of the cable.
This standard does not actually bringing anything revolutionary, manufacturers have already been offering their own external solutions. This will just standardise the connection.