Interesting! Given the size of these windows, I wonder how many birds will be inadvertent collision casualties! I hope an appropriate risk assessment has been done.
Last time I saw the new hide it was still just a collection of posts so it's great to know that progress is now being made.
I can't imagine it would be designed without opening windows, that would be madness. It's not just photographers who want a clear view, people with binoculars and scopes do too. Greylake shows the right way to do it - the glass windows make it light and pleasant, but they open as needed. (Or am I making the classic error of being rational and sensible?!)