Proof of Dark Matter?

Monumental Scientific Discovery: It appears that proof for dark matter is building momentum. It occurs to me that many don't know the significance of such a discovery.  Amongst other things, evidence of dark matter implies that the universe will end in a big chill where it essentially decays after vast oceans of time.  In this scenario, stars run out of fuel, black holes emit all their energy as radiation and even protons begin to deteriorate, until all heat and energy fades away.