Given that xcloud quarter hours is at ~150 mil, it gives 12.5m hours per week.
Even of one play a hour per day, it's less than 2 mil users. And cloud users as enthusiasts of advanced tech tends to play more than average.
You're falsely assuming every player has the same playing behavior/pattern.
Few things we know, over 25 million users in Xbox ecosystem have used xcloud at one point, and over 35 million PC gamers have tried GFN. So at the very least, there's a diverse userbase who has tried the service even if they don't use it actively.
We also know from Nvidia, when they capped their service to 100 hour monthly limit with additional hours being purchasable, that only 6% of the GFN active userbase passed 100 hours, and majority of their users were in the 40-50 hour usage per month.
100 hours per month is 3.33 hours every day for 30 days. Most users don't play every day. And their session lengths average 2-3 hours.
So even if an xCloud user plays 40 hours a month, or 10 hours a week, that would be 3 days of 3.33 hour sessions. Or let's make it 50 hours monthly, so 4 days of 3 hour sessions.
150 million hours per quarter or 50 million hours per month, and 50 hours monthly per user. That would be 1 million users. If it's 25 hours month per user on average, that's 2 million users. If it's 10 hours month per user, that would be 5 million users.
MS only needs to grow the service 4 to 6.66 times from 150 million to up to 600 million to 1 billion hours quarterly in order to create a very viable userbase.
It grew 45% yoy in fiscal year ending 2025, that was before Cloud Gaming expanded to other tiers, especially Essential, and before they expanded to India. Brazil and India demand is too high to keep up for them. And now they're expanding to TCL, Hisense, and Google TVs soon.
So going from 150 million hours per quarter to 600 million isn't that far fetched, I think it's already at 200 million for this quarter most likely. At 1 billion hours quarterly will be a juggernaut with momentum.
At 50 hours average per month per user, 1.5 billion hours per month or 4.5 billion per quarter basically replaces or supplements all 30 million Series users. That is long ways away, but shows you that once the momentum builds up, it's achievable as there are enough gamers in the world who can't afford or don't want hardware.