Development for PS4 and tools required

Can you advise how I obtain the modules for PS4 and PS3 and if i required dev kits or test kits to deploy to PS4/PS3

I wish to develop PSN games (digital) only not retail games.

I am a Sony licenced publisher

Think it’s best for your to contact your Sony Account Manager who’ll get you sorted with Unity. And yes, you’ll need devkits.