The new Mac Pro
No reviews yet, but a unit this small, this powerful, and this "limited" actually brings to mind a future in which the computing "core" is irrelevant. Six Thunderbolt ports, to me, indicates a change in overall design. Simply enough, those six ports replace the five PCIe slots on the older Mac Pro, while still keeping an HDMI slot free for a display.
I don't think it's necessarily going to be considered revolutionary, as it's just a box with ports instead of internal slots. Once someone upgrades in three to five years, though? Removing that one processing "core" and reconnecting everything else within a couple of minutes is going to cause a brief Eureka Moment.