The hard thing is making large sheets and single layer. Multi-layer and small sheets is pretty easy. Too many sheets, and you have graphite though. But those small chunks have some useful properties (same with CNTs, which you can make with a detonation). Also, realize that they don't have 0 resistance (which is a superconductor), read as "it creates heat". This limits the amount of current that you can drive through it. So there's still a lot of problems that need to be solved. But there are definitely huge interests in also looking at using it for filtering molecules. But this is also difficult to do with precision. And that's the root of the problem, precision and consistency. I know that doesn't exactly answer your question, but all I can say is that it feels like we are close.