Is it? I thought it looked like a matrix of 'up'/'down' information holding bits in a magnetic substrate. I must have missed the bit where it could provide transistor functionality as a microscopic remotely-switched current gate.

I don't see how these vortices could be strung together into and/nand/or/nor logic pathways, like transistors do. It really just looks like an information-carrying magnetic substrate. Did I miss something?