However, it will only be available to premium subscribers of the PlayStation Plus service.
According to a leak from the PS App, PlayStation Portal will likely soon get the ability to stream games from the PlayStation Plus library, but only for those with a Premium plan.
On the official PlayStation Portal subreddit, user GetTheWetsOn shared a screenshot of the Deliver at All Costs game page in the PS App. It shows confirmation of the possibility of cloud streaming via Portal. According to the user, similar information (which was later deleted) also appeared on the Dead Space remake page.
Although there is no official announcement yet, the mention of the feature on the pages of two different games in the store is unlikely to be a random error.