Upload & Sell: Off
Thunderbolt, though great, is solving problems that most folk just don't have: USB3 is more than fast enough for most users' external storage needs, and it's cheap (hell, USB2 was good enough for most). For external arrays there is e-SATA, which is arguably better in many ways as whilst it might not offer the headline bandwidth it does offer the full SATA communication standard - command queuing, low latency etc. Similarly, everyone is happy with their existing monitor connections, be they DVI, Display Port or HDMI. And there is little evidence in history that folk are going to flock to buy external graphics processors.
A great technology i'm sure, but with little mass-market appeal cos it costs a lot more than it's immediate competitors and offers little extra that people really want.