From what I interpreted in what he was saying, Mearls wasn't suggesting getting rid of all skills... he seemed to say that those part of our current skills that can be used untrained would instead become default parts of ability checks. Implying then that those parts of our current skills that require a PC to be Trained in the skill in order to use it, would become the "skills" that characters could pick up.
So for instance, Balancing and Escaping a Grab (things you currently can do untrained with Acrobatics) would become just part of the Dexterity check (with all the acoutrement Mearls added.) However, the Reducing Falling Damage (Trained only) part of Acrobatics would then become its own skill that a character could then take. Now whether these would become 'Feats', or they did decide to create the idea of 'Traits' (which many of us suggested they should do that moves all current skill-related or non-combat feats into its own separate category away from combat feats), that I don't know.
So for instance, Balancing and Escaping a Grab (things you currently can do untrained with Acrobatics) would become just part of the Dexterity check (with all the acoutrement Mearls added.) However, the Reducing Falling Damage (Trained only) part of Acrobatics would then become its own skill that a character could then take. Now whether these would become 'Feats', or they did decide to create the idea of 'Traits' (which many of us suggested they should do that moves all current skill-related or non-combat feats into its own separate category away from combat feats), that I don't know.