Cool you can play those PS4 games on PC now, especially God of War. I did their trial when it originally came out and it was bad due to the input lag, but I just tried it again and it's much better now. UC4 looked fine, but they need to get that stream up to 1080p. GeForce Now really takes a shit on PSNow quality with their 1080p/60fps/50mbps setting.
They're probably testing the waters with the limited 3 game deal. Once next-gen gets going and they complete their Azure integration, Sony might offer a few select/premium PS5 titles with PSNow for limited windows of time to drive subs in a way that doesn't hit their digital/physical sales too negatively.
As a PC guy, Game Pass is still far ahead, but if they keep adding decent PS4 titles I could be enticed into a 3-month sub, or even 1yr if they have a killer deal during Black Friday.