I know that DRAM need power to keep it's data and that it's more expensive but I believe that today we have small batteries that will keep DRAM data for years to come.
Could it be viable to have a DRAM storage device that is half way between HDDs and RAM? At start up it loads the OS and installed apps from hard drive and then the system uses it as the HDD?
Hey! What if they do that on the mobo, have RAM slots for a RAM drive? SSDs will not be viable for desktops with those devices.