I would love some sunglasses for running that show some basic metrics (similar to my Apple Watch) for my workout, equivalent to the FORM Smart Swim 1 [0]. However, I would mostly prefer this to be a dumb screen, with all the smarts off loaded to a watch or phone. I'm not sure why companies keep insisting on building such smart glasses as independent products.

[0] - https://www.formswim.com/products/smart-swim-goggles