Okay, I'll take the bait.
QDX is just a trademark, a name. QMC has registered it for a number of different products.
Assuming that question referred to its use in conjunction with quantum dots, the answer is... maybe a lot of what has been claimed. No one buys QMC's quantum dots. Thus, it is still to be determined what they can do and/or how stable they can be. A more thoughtful, critical question might be, "What is real about QMC's quantum dots?"