Originally Posted by majjo
1) It is a brand new port with questionable support and adoption
Every I/O technology was brand new at some point in history.
2) The implantation by Apple will probably not be the final or standardized form of Lightpeak. LightPeak was originally (and still is) designed to operate over fiber optic. Thunderbolt operates over copper (electrical) and Intel is planning on making the switch to optical later this year. What this means for the early adopters of the electrical version, I don't know. It may be a simple as buying an optical-electrical adapter, it may not.
My guess is that Thunderbolt/LightPeak will scale up over time, but the physical interface will remain more or less intact--much like USB. One or more of the copper wires will be replaced by optical fiber once that goes into production, but because the physical interface would remain the same, users of "older" Thunderbolt-based peripherals will not be left in the cold--and probably won't even need an adapter. But I'm an optimist.
3) Theres the licensing issue. As mentioned above, you can't get an AMD system with LightPeak (at least not currently). For Apple, who uses Intel exclusively, this isn't an issue. For companies that make use of both Intel and AMD chips, this can get complex. And based on the hype surrounding BD and Llano, we might be seeing a lot more OEM AMD systems soon.
As I understand it, Thunderbolt is driven by a controller chip, not the CPU, so why can't an Intel controller chip live on an AMD CPU motherboard? (I'm asking honestly, because I don't know.)