We can't help but think that the Vaio Z laptop could have been a much better product had Sony chosen to re-engineer its Power Media Dock into something much more elegant and practical.
As it stands, Sony connects the PMD to the business ultra portable laptop through a proprietary connector, using Intel's LightPeak technology and with the help of two cables (the LP one and a power cable).
As for the PMD itself, it is a tad longer than an external optical disc drive and includes VGA, HDMI, Ethernet, USB 2.0 & 3.0 ports. Sony has discarded i.Link (Firewire) from the PMD and the laptop but is still sticking to Memory Stick storage format.
You do get another HDMI and VGA port on the laptop which allow you to connect three more screens for a grand total of four displays in all. But - and here's the deal breaker - why didn't Sony combine the optional flat extended battery peripheral with the PMD into one sleek useful docking station?
That particular accessory allows users to extend battery life to up to 16.5 hours which would make it a real hit with Vaio Z users on the move; merging both together, even if it meant less juice does make perfect sense as it would reduce the amount of accessories (and cable) that users would have to lug around.