- Performance improvements (boot time is 30% faster than Windows 7)
- Cortana can now recognize your handwriting and track your events – like a real assistant
- Cortana can also point you to coupons while you're shopping on-line
- Cortana can send texts via your Windows phone (in preview.)
- Edge is faster. It syncs your passwords and favorites across your Windows 10 devices
- You can now send video from Edge to Miracast or DLNA devices (like Chromecast and Roku)
- App updates to OneNote, Calendar, Mail, Photos, Store and a few others
- There's a new messaging app (in preview) that allows replies in notifications.
- Nested virtualization – I'm sure someone, somewhere has a need for this…
- Swipe switching, swipe down to close are back
- Better RAM usage (W10 compresses unused pages instead of swapping them to disk)
- Speed Shift (with Skylake processors) – improves responsiveness and battery use
I don't use Windows 10 daily, but I do have one device that gets updated with each preview release. Are you a regular Windows 10 user? What are your impressions?
Microsoft announces this kind of thing on their blog – here's yesterday's.