Thank you guys for all this info.
OK, so Android and iOS can have the same security threats, no more no less.
Widgets seem to be very handy, can't wait to configure my own. Concerning the phone, I will choose the Nexus 4 (this is this device, with its amazing low price for its features, which made me consider switching), so I guess it will be powerful enough to run recent apps.
I have a couple of other questions :
- With Android, how do you backup your device ? Is there a cloud backup solution like iCloud ?
- How do you restore an Android phone ? Is there a particular software for PC/mac/linux which has the same sync / backup / restore functions like iTunes (which I don't particularly like) ?