PS4: Reasonable price. Most powerful console. Strong 1st party exclusives. Peerless 3rd Party support. PS VR.
How can/will Sony reach new customers with PS5?
I mean, your PS4 analysis would mostly be justified for the PS5 too.
It's not just about features, it's about reach and moving to new markets.
Part of PS4's success has been gaining traction in different markets, such as the Middle East and expanding further into SEA.
These will continue to develop.