The dark spot is only an issue if you're using a laptop or something. Pen and a pad of paper is fine outside. Loose stacks of paper is obviously not ideal.

Unfortunately, most of us need to work using screens these days. I have hope for the future with these smart AR glasses. With the screen on the glasses, it shouldn't be a problem to use them in bright light. And, feeling the sun on your skin is one of the best parts about being outside when the weather is good.