Three different things.

History - started a long time ago in the 90's (designing S60). We use the user experience framework as the basis of designing UI - input, output, performance, functionality, design and usability, personalisation. We are using these as framework - platform has been designed with this in mind and we have developed each area in the subsequent versions.
       
Now we are adding new areas into the input area, and then design and usability gets sensor frame work and UI accelerator

New features of touch - platform perspective - different kinds of keyboards, with, without - flexible. Sense of familiar - people who know how to use S60 now will be able to use S60 Touch. 
Wide support for languages - different kind of language input support.
Tactile feedback - feature helps users in mobile context - physical feedback from tapping or clicking

Sensor framework - motion based cases (silencing incoming calls, silencing alarms). Manufacturers can add more sensors and add in more and more use cases.

Comparse and contrast with iPhone - comparing platform with individual - i.e. the flexibility is important. Support both finger and stylus. 

Personalisation is very important because it means people may it look what they like.

Multi-touch - dont want to reveal too many details.

What kind of apps are going to take advantage of this?

New elements like toolbars that are foremost functions. Virtual dilaer. Virtual keyboards inlcuding handwriting recognition.

What about existing apps - backward compatibility for 3rd Editions applications (assuming common S60 UI components)

Developers - totally new area for them to look at. Interest around games, productivity

Traditional S60 devices without touch, don't have to though. 3 types of devices

We are expecting first devices next year

UI accelerator toolkit - software - for manufacturers so they can design new applications - new possibilities for graphical effects (scalable layer and so on), great new for designers.

http://www.youtube.com/watch?v=nM_q8oAPAKE

http://blogs.s60.com/voiceofs60/2007/10/podcast_30_minna_korvanen_s60.html

S60 will introduce new features that enhance the user experience and enable manufacturers, developers and operators to design new types of mobile devices, applications and services.

The touch user interface in S60 smartphone software offers licensees the opportunity to develop devices with a variety of input methods, whether it is a touch screen with a traditional keypad, touch screen with a qwerty keyboard or touch screen alone, supporting both finger or stylus optimized input, in addition to the range of access options that already exist today.

S60 touch user interface comes with support for tactile feedback, which means that there is a physical pulse and feedback when the user taps on the screen. This provides better awareness of the device's response improving the user experience.

Existing S60 3rd Edition applications will run on touch enabled devices unmodified. Tools will be made available for developers to further optimize the touch experience of their applications.

From motion and orientation to proximity and light, sensor technology is expanding to new areas and shaping the future for mobiles. S60 brings sensor support to the platform as a generic solution enabling support for a range of sensors in S60 devices. These technologies open up a new kinetic world to the user and offer completely new opportunities for application and game developers.

Also, the new UI Accelerator toolkit will allow device manufacturers to develop rapidly and easily impressive graphical effects and new types of interactions, further increasing the user appeal and excitement.

http://www.redferret.net/?p=9533