No, I don't believe they'll put the monitor next to a window. I think they will be genuinely used in schools once handed over.
But procurement for these monitors hasn't even started, they're going to start looking into suppliers on 23rd August. These things (as we know with the laptops) move slowly. They are going to prioritise special schools as they have more vulnerable pupils, which is good, but they also have far fewer pupils which is likely to mean fewer issues with C02 (although I have no idea about the special school estate, so happy to be corrected here if special school colleagues think ventilation is a major issue in their classrooms).
So we are looking at months until a delivery of these monitors. Once we get them and they inevitably start to go off, what then? A monitor that tells you your room is poorly ventilated (which we already knew) isn't a solution to that problem.
So the government will say what? We told you to open a window? And then it will be down to the union and parent groups to campaign again and say 'you gave us these monitors and now we can prove there's a problem, where's the money to fix it?'
Until some money to fix the problem actually arrives, I remain sceptical that there is any intention on the part of the government to spend a significant amount of money on schools.
This is just a kicking the can down the road exercise. And given that schools are going back in September with high infection levels and no mitigation measures, it's unlikely that covid is going to hang around waiting.