This may be obvious, but they rely on all the needed ports being on the same side. On my non-unibody Macbook pro, power is on the left side and video is on the

This may be obvious, but they rely on all the needed ports being on the same side. On my non-unibody Macbook pro, power is on the left side and video is on the right side. Also, I suspect a mini display port is much easier to snap into place than a DVI port.