well... if i needed a deck that would last for life, and i was buying cards because of wear and tear often, this wouldn't seem like the worst idea, really. as for if they are printed on card stock or not, i watched the videos on the KS page, and they do not seem like a fake. i also noticed in the picture you showed above, mr. faukx, that the way the pattern lies on the cards is different from one to the next, from what i could tell by looking at the corners.
if i was going to get one of these, i think i would have to go with the red first, or the blue- they are a hundred times better looking than the plain black, although it may just be the way i'm seeing them, since they are not in my hands. (if you watch the video of the colored thread decks, you will notice the depth is more than you could achieve with printed images) if i was a backer, i would actually pull my pledge if we didn't reach the strech goal. speaking of which, why the h*ll are different colors a goal, when i doubt there is any printing minimum? it seems like he would be allowed this option from the start... o.O?
i guess considering a pledge for four of these cards is $20, i have to think $120 for a deck and a metal case (because if you are going to spend $100 on these cards, why wouldn't you spend the extra $20 on a decent case?), all shipped, is pretty reasonable. although, i have no idea what carbon fiber costs, even in bulk, so i could be way off.
personally, i would be more likely to consider this deck if it were more unique than just the material it's made of. some custom work would be nice, but it would even look better if the colors weren't so damn standard... they even have one-way backs, for God's sake.
maybe they will improve when the creator starts getting some feedback. it might be worth watching.