And that won't be enough either. How much exclusive content can you get out there from your first party, in a service that directly competes with other platforms but everything runs potentially with all the pet peeves of streaming subscriptions? Your exclusive content must be timely, enough in quantity, and amazing enough to make people more interested to subscribe than buy a PS or XBOX.
And I can't see that happening, because people are interested in a perfect experience of exclusive and third party games. Why should someone prefer a streaming service to play FIFA, COD, Street Fighter, Need for Speed, Witcher, Resident Evil etc when they can buy an XBOX or PS and plug it and play perfectly on their 4k TV? There is no real incentive. The benefits are not there. There are likely more disadvantages than benefits on every multiplatform game.
Your exclusive content must be SUPER exceptional to be able to substitute everything that is lacking.