The Tech Report has some more info and notes you can expect it in Q2 2019 for ultrabooks, All-in-One PCs, and SFF PCs. It will be offered in 16GB Optane + 256GB NAND, 32GB Optane + 512GB NAND, and 32GB Optane + 1TB NAND versions.
It's not clear which of the two strategies Intel's bringing to bear in the H10, but the mockup of the drive appears to include both a flash controller and an Optane controller. The presence of these two distinct chips may be an indication that Intel's going to take care of the bit-wrangling in software. After all, such software already exists for use with the company's low-capacity Optane Memory storage accelerators.