What would you exactly do with 1 TB of RAM in your workstation?
But seriously, my reading of Intel's announcement is that Optane modules are a form of SSD and not dynamic RAM. Thus the access times are orders of magnitude longer than for "real" DRAM based DDR4 SIMMS.
But it is permanent storage, not ephemeral, like RAM.
So, either it takes the place of SSD and maybe we have new algorithms for accessing that permanent storage, or it sits as an additional layer between RAM and SSD.
Maybe what we call RAM today becomes a L4 cache into the much larger storage of Optane.
Dunno, but Optane is not nearly as fast as RAM, so you’re not really going to be able to effectively use it like you would have with RAM.