Apart from dob and gender, I don't think this census would give much info to a future family researcher. Place of birth - country only, what good is that if you can't find your ancestor. At the moment my daughter is living at her normal address, her daughter is at Edinburgh Uni (so no census for her) and her son is in Nice. How anyone would be expected to find them is questionable.
However, if as Guy suggests, the census will be destroyed before 2122, then family researchers will have to find another way of tracing ancestors - Facebook, Instagram etc? there is plenty of evidence of what people were doing on there.
