What's new in iOS 6?

Ok so there's no iPhone5 coming soon. "They seek him here, they seek him there ...". But there's new iOS 6 and it's got some very useful features.

• Maps from TomTom give us turn-by-turn navigation, 3D flyover, but no street-view.
• Siri can give us game scores, summaries and player stats, tweet our messages, understand 15 languages (but not Swedish), and become the next hands-free solution for some new cars. 
• Facebook integration with contacts sync and calendar sync. Twitter was already integrated in iOS5.
• You can now send a predefined SMS when you can't take an incoming call. Very nice feature.
• Passbook can keep your boarding passes, movie tickets, retail coupons and loyalty cards. Passbook will alert you if your gate number changes. Great feature when gate numbers change at short notice and many of us know they do!!
• Facetime is now available on mobile (cellular) networks.
• Mail has been improved, but I think it was great already. Same thing with Safari browser.
• These devices are compatible with iOS 6:
• Iphone 3GS, 4 and 4S. 
• iPod touch generation 4. 
• iPad 2 and 3.
• Support for iPad1 has been dropped, which is sad.

UPDATE:
To complete the above picture, here's more information regarding the availability of features in older devices, which I copied from http://www.apple.com/ios/ios6/:

Features are subject to change. Not all features are available on all devices.

Some features may not be available in all countries or all areas. Flyover and turn-by-turn navigation will be available only on iPhone 4S and iPad 2 or later. Cellular data charges may apply.

Siri will be available only on iPhone 4S and iPad (3rd generation) and requires Internet access. Siri may not be available in all languages or all areas, and features may vary by area. Cellular data charges may apply.

Shared Photo Streams requires iOS 6 on iPhone 4 or later or iPad 2 or later, or a Mac computer with OS X Mountain Lion. An up-to-date browser is required for accessing shared photo streams on the web.

FaceTime over a cellular network requires iPhone 4S or iPad (3rd generation) with cellular data capability. Carrier data charges may apply. FaceTime is not available in all countries.

VIP list and VIP and Flagged smart mailboxes will be available on iPhone 4 or later and iPad 2 or later.

Offline Reading List will be available on iPhone 4 or later and iPad 2 or later.

Made for iPhone hearing aids require iPhone 4S.

Find My Friends and Find My iPhone enable you to locate iOS devices only when they are on and connected to a registered Wi-Fi network or have an active data plan. Not available in all areas.