Netflix grows just fine. Where does Sony go with PS hardware after the PS4? Slightly prettier graphics, a bit better framerate, bundling VR? These are not additions or upgrades that will get people to part with $399 all over again. If PlayStation is going to make it to 2020 intact then it must transition into an on demand service, and PS Now is the basis for that transition.
But you are basing all your thinking from the perspective of an investor with a well-connected 1st world persepctive.
Bundling VR or basing PS5 around VR may make a lot of sense... we don't know, yet. But over the lifetime of the PS4 we should get a good indication.
PS Now is a powerful tool and is sure to be the core moving forward, but even more than Netflix, which you keep referring to - it is entirely dependent upon a network infrastructure that barely exists in most of the US - never mind the rest of the world.
By abandoning hardware you are abandoning much of the US, much of Europe and every emerging market. As an investor are you happy to kiss goodbye to all that to limit your offering to the top 1-2% of the worlds population.
There are good reasons to probably have one more generation of hardware before moving to a services only model. I agree it is the way forward, but it is WAY too early!
This is the type of "quick buck", short term thinking from an investors perspective that blights the modern world.