Microsoft Edge: Microsoft's new browser

The burning questions for me are;

- Will Edge only be available to Windows 10 users or will there be an upgrade path and will it work on Windows 7 & Windows 8/8.1?

- What are the developer tools like in Edge?

- How fast is it? More specifically, Javascript performance.

- Will releases come out more frequently keeping the browser up-to-date with the latest standards like Firefox, Chrome and Opera do?

- Any plans to release Edge for other devices and operating systems, perhaps Mac?

I am pretty excited to see what comes of Edge, dropping the IE branding was smart, but as a front-end developer who has experienced years of pain thanks to versions of Internet Explorer less than version 10, it will take more than note taking, annotation, a new simplified design and Cortana assistant features to win me back to camp Microsoft from camp Mozilla as my day-to-day browser. I will be giving it a chance on launch and if Microsoft have finally solved the IE problem, I will use it as my default browser.