Here is one very good article about new Windows 8 UI, metro, from Windows developer group themselves. You can see neat breakdown of touch gestures in Windows 8 and potential issues.
Must read if you are interaction designer that involves touch gesture stuff.
Contextual – they only happen at specific location(s) or on specific object(s)
React immediately – there is a direct correlation in cause and effect between your interaction and the system (this does not include visual affordance)
Direct (could possibly be considered indirect by way of augmenting your actual interactions with the reaction of the system) – your actions directly affect the system, object, or experience in some way
Gestures
Not contextual – they can be anywhere in the system in location and time
The system waits for the series of events to complete to decide on how to react (again, this does not include visual affordance)
They contain at least 2 states
Indirect – they do not affect the system directly according to your action. Your action is symbolic in some way that issues a command, statement, or state.
DESCRIPTION
Articles barely related to Ergonomics, Human Factors, User Interaction, or User Experience.