José León has been posting some in depth videos about the changes in the Delphi IDE to support iOS development (and not only that) in XE4.
The complete series is on his blog at joseleon.es. Specifically the first three videos were published in April, while there have been 6 more already in May.
This is the first one, as an example (and a very nice one):
Stay tuned to José blog for more about the RAD Studio IDE.