perhaps...
A bit of background first. I've been a computer science person since 1968, and have been teaching CS in two different major universities since 1970. The reason for saying that is that I have a lot of background in computer architecture.
The thing that gives me pause here is that you have about 52 cards in a space of about 1/2". A typical magnetic disk drive certainly can pack the equivalent of 1000 cylinders of information into 1/2", but there the read/write heads are so very close to the disk, the disk is spinning at a constant speed, and the read/write heads are precisely positioned over each "track" as it is read.
To read something magnetically requires motion. So I assume mindplay is not using magnetics, but rather some form of "RFID" the small chips that can be read by a radio-frequency "trick" that eliminates the magnetic requirement of "motion".
My concern is how to scan RFID chips when there are 52 of them stacked on top of each other in a 1/2" space. IE how to reliably read each one, in order? While I won't say it can't be done, it would seem to me that it would be a technology nightmare to keep it running.
I'm aware of a casino/IT company joint development to put RFID into casino chips to accurately track chips as they are played and given back to players, but a person I talked to a few months back said that the idea of "stacked chips" was turning into a headache since the goal is to make this 100% unobtrusive into the game. IE nobody wants to have some special set of procedures for (say) placing bets that is different on an electronic table from a normal table.
The mindplay site seems to suggest that the cards are scanned as they are pulled from a shoe, rather than being all scanned at once as the deck is "squared up" or whatever. Whether that is really what happens is a guess, as I could see a casino's interest in scanning _all_ the cards before the shoe is put into play...
I'll keep looking but it is hard to say (at present) what is fact, what is fiction, and what is just "hype"...
IE one effective counting counter-measure is just a "threat" of some superior technology that makes counters go elsewhere.