Our estimate for the total information processing capability of any system in our Universe implies an ultimate limit on the processing capability of any system in the future, independent of its physical manifestation and implies that Moore’s Law cannot continue unabated for more than 600 years for any technological civilization.
Limits to computation
Ultimate physical limits to computation, Lloyd, Seth (2000)
Universal Limits on Computation, Lawrence M. Krauss , Glenn D. Starkman (2004)