Exabyte type systems are possible today in desktop/laptop form factor... the real problem is that it will take time for the market to actually adopt it (and even when it does, it will probably 'cost' too much money, even though the manufacturers will probably be making them for next to nothing - 'cost efficiency' at its finest - has nothing to do with technological ability to make something in abundance with high technological efficiency and minimum expenditure of resources, but more to do with companies spending the least amount of money possible while earning the most).
Still, even in this day and age, as technology is becoming ever so cheaper, we might see accelerated adoption and much larger leaps (though I somehow doubt it because it would mean potential losses in terms of monetary gain because its more profitable to milk existing outdated technologies and revise the heck out of them instead of releasing the best of what we are capable of - which would actually translate to 60-100 years more advanced technology realistically, if we were to use our latest scientific knowledge which can be applied in practice - but Capitalism never does that).