I think the NH results speak for themselves, but in the interest of completism, my brief thoughts.
Bernie has always had a very narrow path to the nomination. It requires
him to win big where he can, rack up delegates, and start to poach
party support (and super delegates) from Hillary. He far out-performed
polls in NH, so his path is a little wider this morning. Big, big win.
We'll learn a lot about this campaign after Nevada and South Carolina.
The big question with Trump was whether his poll numbers were inflated
by non-voters who wouldn't bother to cast a ballot. As one data point, New Hampshire's speaking pretty loudly. He
out-performed the polls, which suggests his national numbers may be
real. (He may continue to under-perform in caucus states.)
worst news for Republicans is that voters aren't settling on a non-Trump
candidate. Kasich is now in the mix, along with--amazingly--Bush. Cruz
remains viable. It means Trump can continue to win states and rack up
delegates while getting only 35-40% of the vote. I don't think anyone is
taking Trump's chances lightly any more.