When I notified ExtJS would be upgraded to a mobile framework, my first impression was that this will be great and impressive.
I watched demo and examples and everything was cool, fresh and usable.
You say that using Sencha I can develop application that looks like native application without have to learning os-oriented SDK...
what about "mobile" features as "when a call is coming??" or "send a sms to some contacts" ??
what about the needs to share information between different applications (for example contacts) ??
what about geolocalization using GPS integrated feature??
Some features will be provided thanks to HTML5 support (audio, video, localStorage) but I think that these are not enough to develop complete mobile application that uses *really* our device.
What do you think? Am i completely wrong?