Maybe they've managed to tweak the Edge browser so it now doesn't break parts of websites into a gazillion pieces.
They're probably going to drop support for keyboard and mouse and you can now control everything via a rectal probe.
do you need a microphone for cortana? if so, would assume many desktop users like myself don't have one
It's going to be an AI. When you switch it on and log in, it will say "Hello <name>. It's a lovely day outside, weather is going to be 20C with a slight breeze. Now, I've opened up Google Chrome and Gmail for you, so you're ready to get started. Is there anything else I can help you with at the moment?"