The book came out yesterday instead of this Tuesday. There is a lot of information about the sword coast. Couple racial variants: deep gnome, duergar, Ghostwise Halflings, Half-Elf variants, and Tiefling variants.
Class wise only a couple didn't get new specializations, Bards didn't get one but got a list of all new instruments (The recorder is an actual instrument in the sword coast its called a Songhorn), Druids and rangers got squat. But the new specializations and additions to some look fun to play.
The new spells are only cantrips and available to Sorcs, warlocks, and wizards.
Backgrounds are basically variants of the normal backgrounds.
Definitely a worthwhile read