It is not just a next major PHP version being released today. The release being introduced is an outcome of the almost two years development journey. It is a very special accomplishment of the core team. And, it is a result of incredible efforts of many active community members. Indeed, it is not just a final release being brought out today, it is the rise of a new PHP generation with an enormous potential.
Of course to get up to speed quickly on all the new stuff Laracasts has you covered with their free PHP 7 Up and Running series.