As Kurzweil writes in the article, this is exactly one of the arguments against the singularity that Kurzweil brings up and discusses in his book.
Lots of people argued that if space exploration or car engineering continues growing at an exponential pace we'll have flying cars and space colonies. They didn't explain why the growth should continue to be exponential and not end up as an S-curve.
In "The Singularity is Near" Kurzweil argues and shows why computation and reverse engineering of the human brain are subject to exponential growth. Short answer: there are lots of competing technologies and researchers that have different ways of ensuring that current computational advances continue well into the future - we are far from reaching any physical laws that will stop us.
Lots of people argued that if space exploration or car engineering continues growing at an exponential pace we'll have flying cars and space colonies. They didn't explain why the growth should continue to be exponential and not end up as an S-curve.
In "The Singularity is Near" Kurzweil argues and shows why computation and reverse engineering of the human brain are subject to exponential growth. Short answer: there are lots of competing technologies and researchers that have different ways of ensuring that current computational advances continue well into the future - we are far from reaching any physical laws that will stop us.