Works very well for me. Shows me my flights & flights of relatives and status of their flights. Shows me meeting reminders and traffic to there. Also, tracks packages that come through on email along with hotel bookings.
Interesting question, I feel that if you are good in a particular area (Say php / css / js / html) then you will find each new component / framework actually simplifies your life or makes it easier. The trouble is if you are more of a heavy js developer and are typically labelled as a web developer. Then you feel like you have to know about SASS (css) / HTML5 video standard / Scala and everything else related to the web field!
I think that as web development grows and matures, it will finally have multiple experts who need to work together and with each expert having no problem in catching up or using the latest paradigm in their area.
I would recommend you specialize / try and learn whatever you are good at.
On a related note we put out a tech demo showing nodejs and socketio recently. http://www.webdigi.co.uk/fun/space/
It uses iPhone accelerometer to control the ship on your browser game!
There are much more producers now with youtube and more interesting links sites like YC and many others etc.
Now they all need much more consumers that do no use the traditional medium like TV. We need much more consumers with the iPads that consume these interesting artilces / stories and comment, share with friends just like I am doing right now on my iPad.
On nexus 5 and primary phone for all emails.