I doubt we'll ever see that high of a capacity ever become normal. At that much of an absorption you'd be changing once every 36-48 hours. I've had plenty of times where I won't neeed to change my current crinklz diapers for 16-20 hours. By this time I'm already smelling really bad and begining to develop a rash, not to mention needing to poop bad too. Doubling that time between changes would just be a big detrement to our health and well being.
That said, I can see 10,000 ml diapers being made one day. They would be really expensive and sold in limited quantities to those just wanting the feel of a really thick diaper. It would be a niche market, far from main stream even amongst us here.