starburst asked:
[W]ould that mean that the estimates of the total amount
of matter in the universe will have to be revised upward?

It probably does not have implications for the total amount of matter
in the universe. It does have implications for Drake's Equation
estimating th probability of extra-solar life -

N = N* fp ne fl fi fc fL
http://en.wikipedia.org/wiki/Drake_equation
http://www.pbs.org/lifebeyondearth/listening/drake.html

- Peace Canopus56