So far the playtest packet has included dwarves, elves, halflings, and humans. Although I know that we haven't seen anything close to the final version yet, I really hope that gnomes are included in PC races. Gnomes are an 'iconic' D&D race for me since they have been in the game since the AD&D 1e PHB. Also, although they are not a race that is commonly played, I always enjoyed gnome illusionists and tricksters. Sure the PHB can include dragonborn and tieflings, but I want there to be gnomes too!