QT and LGPL 2.1

[Apostle]

I was reading here http://www.qtsoftware.com/about/news...ble-under-lgpl
I found now the QT is moving to LGPL, but I wonder what is licencing difference btn wxwidgets and now QT 4.5? Also I would like to know commercial side of LGPL. Lastly why should I chose QT over wxWidgets or vice nersa??

Thanks all