I think that when the technology of data storage has evolved by changing scale, i.e. for example when the price of 10TB is at the current price of 1TB, it may be possible to increase the size of the blocks as this will not harm decentralisation, however we may be close to the theoretical limit in data storage
(facepalm)
1990's hit the theoretical limit of portable data storage of 1.4mb(floppies)
oh wait CD-rw's
1990's hit the theoretical limit of portable data storage of 700mb(CD)
oh wait DVD-rw's
DVD hit the limit.. oh wait blue ray
an along side all of that flash drives
portable hard drives
so theoretical limit.. is what, and when exactly?