With the rise of Stadia, Apple Arcade, Game Pass and even Google has Google Play Pass coming soon.
Amazon Game Streaming service will likely be tied to Twitch Prime and part of the Amazon Prime Subscription service. Microsoft will likely include XCloud in Game Pass Ultimate, while likely also include Mixer Subs and this would likely be part of the rumored Microsoft 365 Consumer Bundle, which includes Office 365, Windows 10 and other services and likely will include Game Pass Ultimate.
PSNow is cost $20 Per month for just Game Streaming, there's nothing else, not even PS+, and no where near the other inclusion of other Sony services.
Unfortunately I see PSNow struggling against these types of subscription services where you can access multiple services, All in One Subscriptions.