I've seen several popular reports of a new count of low-mass stars in elliptical galaxies (here's one).
Edit: Pursuant to several correct comments I've changed the title to agree with the actual report which is that the recount concerns elliptical galaxies---and I don't know where I got the notion that it concerned dwarf galaxies---but I am leaving my comments belo intact as they represent the way I was thinking before I was corrected. Note that we are in fact talking about relatively few very massive galaxies instead of many very light ones, but the questions are largely unchanged.
My first instinct was to dismiss it as mostly interesting to those who specialize in galactic dynamics, but then it occurred to me that there must be a lot of those galaxies, and I began to wonder about the baryonic-matter/dark-matter/dark-energy balance.
My guess is that this makes little difference to the matter/dark energy part of the equation because the total matter fraction is derived from large scale measurements of cluster dynamics. But even if I am right about the matter/dark-energy thing, that leaves the question of baryonic vs. dark matter fraction.
Can anyone shed some light on this?
Also, links to pre-prints or journal articles related to this measurement would be welcome.