Re: I'm still waiting...
You will find it filed under "Racetrack: memory (IBM?). It's all the rage, like MRAM which is, IIRC, Thin Film magnetic memory (as used in the early 70s), but "on a chip", or FRAM, again IIRC, Ferroeletric RAM (demonstrated at Bell Labs in the Mid 1960s) "on a chip". This whole "on a chip" thing is like patenting some 500 year old concept, but "on a computer".
Maybe I should look at SAW devices with integrated electronics to implement the EDSAC acoustic delay line memory "on a chip"