Ok, while having fun with FroYo I notice a lot of new things. Let's try to compile them all together.
Overall:- It's faster
- 720p recording.
- Screen can now also be rotated to the right!
(Found by martintzvetomirov)- Dialer has new Android robot, kinda 3D looking one now.
Lockscreen:- A delay can be set in the settings menu.
- Can now be a pattern lock, PIN lock or an alphanumeric password
- The lock pattern has grey middle buttons instead of black.
- Instead of just the time of the next alarm time. It also shows which day.
Settings:- Wireless Networks contains settings for WiFi Hotspot
- New seperate menu for Screen settings.
- App screen is split up in 4 tabs: Downloaded | Only actived | All apps | On SD-Card
- Keyboard allows for Chinese input
- Keyboard allows for quick language change.
- New screen for speech.
New Apps:- HTC Share App
- News & Weather
- Videos
- Voice Search
- WiFi Hotspot
- Torchlight
- Search (Google)
- Pictures renamed to Gallery
New Widgets:- Calculator Widget
(Found by jaymit)- Market Widget
(Found by jaymit)Contacts- Option to automatically send someone directly to voicemail now.
Messaging:- The bottom box to type text is bigger.
- Now shows how many characters you have left from the start.
- New icon for send.
- New icon for attaching something.
- Scrolls smoother when a conversation has a lot of messages.
Gallery:- Icons from the Sharing menu are smaller. In portrait mode, all are visible in 1 view.
Gmail:- Now displays your email adres all the time in the upper-right corner.
- Displays a small icon of the person that send the mail if you have them in your address book.
- When viewing a mail, there are now buttons to go to the next and previous mail.
- Can copy text to clipboard now via menu button.
Google Talk- New interface
- Don't know of much more, I don't use GTalk.Market:- New option to allow automatic updates.
(Found by jaymit)- New seperate tab for app comments.
- Can now mark comments as: Useful, not useful and spam.
Music Player:- When no cover available, the music note is now green.
- Pressing next has a MUCHHH smoother CoverFlow animation
- Genres are FIXED now.
- Pressing the left-button to open up the menu happens much faster.
- Shuffle seems better (not sure, but don't bump into same song that often anymore).
More coming, there's just so much. So I'm gonna put this topic already out there!