How smart phones and the web centralize your digital life again

I admit. This is from the point of a Android user, but I think it shouldn't be different if you have any other OS on your phone.
Basically we are at the end of a phase where there is no more need to carry around floppy disk (in case you cannot remember, click here). Actually the media got physically bigger first (Floppy disk, CD, DVD, external Harddisk) only to get smaller last (USB-Stick) and finally disappear. This is where the dropbox comes in. Online storage for free (BTW: If you use my link we both receive 250MB more).
This is where the second line comes in: Next to storage and carrying data from one place to another (the workaround to email everything back and forth does not count) is the fact, that we all use various computers. Various computers, files, versions... ...I think you get the point. So the idea is brilliant.
And the most brilliant idea of all was to make the cloud available for phones. So I have my calendar, my dropbox, my everything with me...
Can anybody tell me: If the cloud knows everything. What is the equivalent to a thunderstorm?