http://www.eurogamer.net/articles/d...ion-4k-neo-and-the-original-ps4-will-co-exist
Games running in Neo mode must operate at a native rendering resolution of 1920x1080 (1080p) or higher.
No new Controller & games must operate native 1080p.Dual Shock 4 remains the primary controller: Sony has no plans to introduce a new joypad for the Neo hardware. The Dual Shock 4 remains unchanged and Sony has actually mandated that all existing peripherals should be supported with no segregation between PS4 and Neo.
I hope this will remain.Sony is happy for developers to list them, but explicitly states that developers are under no obligation to up-sell Neo to original PS4 owners.