Windows 9 was suppose to be true 64-bit and Windows 10 64/128-bit but we are no where near both. Still everything is 32-bit with some 64-bit software. Software and Hardware manufacturers need to sit down and get this going. Where are we today. When we left 8/16-bit for 32-bit. That was a start. Then they introduce 64-bit with 32-bit and we're still stuck.
The whole point of moving to a 64bit architecture was to have the ability to address more RAM...
64bit addressing should get us up to 16.8 million terabytes of RAM which is enough to back up half the internet to a RAM drive... at this point in time (and for probably the next decade or two) there is no reason to move to a 128bit architecture.