You're playing with fire xD
I'm of the opinion that Sony doesn't have to do anything. Sony has dominated the gaming space since the original PlayStation, minus the PS3 which still sold over 80 million units. Sony is of the "if it ain't broke, don't fix it" business model, and it works. PS5 is well on track to selling over 100 million units in its lifetime, and their first-party games are always going to sell gangbusters. They could definitely add to the value of PS Now, which they have partnered with Microsoft in adding Azure to shore up their streaming, but do they need to go all out in putting out their own competing Game Pass service? No.
I'm fine with them adding their games to PC to bring in a substantial amount of additional revenue.
I'm fine with all 3 companies doing their own thing and all 3 being competitive. Which it does look like this will be a very competitive generation!