In order to simplify skills, there will now only be 3 skills in the game (much like how they reduced the 7 different saving throw types in 2E into just 3). Those skills are:
Physical
Mental
Social
Physical will cover all your physical-based skills. Balance, Jump, Tumble, Sneak, etc.
Mental will cover all your mental-based skills. Knowledge skills, Search, Appraise, Deciperh Script, etc.
Social will be taking care of skills such as Bluff, Diplomacy, Intimidate, Perform, etc.
Simplification and less bookkeeping is key!