This is not related to your question, but I thought it is important (and interesting) to note that predictions in physics can turn out not to match reality very well:

The vacuum catastrophe is sometimes cited as the biggest disagreement between theory and experiment ever. They disagree by a factor of at least 10^107.

Link: What exactly is the vacuum catastrophe and what effects does this have upon our understanding of the universe?

In cosmology the vacuum catastrophe refers to the disagreement of 107 orders of magnitude between the upper bound upon the vacuum energy density as inferred from data obtained from the Voyager spacecraft of less than 10^14 GeV/m³ and the zero-point energy of 10^121 GeV/m³ calculated using quantum field theory. This discrepancy has been termed "the worst theoretical prediction in the history of physics!"

More: http://en.wikipedia.org/wiki/Vacuum_catastrophe