Agreed on the tech/science developing forwards as a species...Would be fascinating.500 years? Yes, if it means I get to see humankind become a near type-2 civilisation. We will have matured energy generation providing limitless energy and from that point onwards all manner of things in all areas of human life would be benefitted so I'd want to be able to see all of that compared to all the naff we have to deal with today.
You can actually sign up if you're rich enough to pretty much live 500years or more. Just freeze yourself for a 100 years at a time only being unfrozen to live for say 5-10 years to see progress, then back in the fridge you go. Cryogenics will be a major player in future long distance space travel too so it too will become a matured technology.
Yes cryogenics could have it's place in our progression through time. I like the idea of using it to fast forwards. We might also be able to bend/manipulate space time moving forwards