The steam deck is currently ranked 6th in global steam revenue. The cheapest steam deck is 400 dollars.
If we assume the steam deck is generating 100 million in revenue per month which would be the equivalent of a 50 dollar game selling 2 million copies a month (we know for example Dune awakening is at around 700K units sold since it launched).
Assuming every SKU is the cheapest one, which we know it isn't 100 million divided by 400 is 250K units.
The most expensive steam deck is 650. The fewest units would be at about 150K units.
Think it's safe to assume it's around or under 100 million in revenue per month. Lest we believe Eldenring Night reign is doing 2.5 million units per month. We know it's done 3.5 million total across platforms in 2 weeks. We could maybe extrapolate that to 5 million (6 if we were being generous) over the month, and assume at most the 2.5 would represent half the total sales going to PC.
It said the by the end of summer