The latest research paper for this UltraRAM talks about...

The latest research paper for this UltraRAM talks about single-bit memory cells with gate sizes of 10 and 20µm. There is a loooong way to go and this media coverage seems to be about sounding out potential funding partners.

"In both cases, the devices operate at a remarkably high speed for their large (20 µm) feature size. Assuming ideal capacitive scaling^[33] down to state-of-the-art feature sizes, the switching performance would be faster than DRAM, although testing on smaller feature size devices is required to confirm this."