successor to MDI?

[Danny Shevitz]

Howdy,

I'm a gui and wxPython newbie who has been tasked with developing a gui for 
a specialized tree building program.

I bought wxPython in Action and was intrigued by the comment on page 242:

"""
Remember MDI?...We recomment using MDI only in cases where the user expects 
to see all of the application windows together, such
as a game...
"""

The last gui I developed was MDI, which probably dates me. So the question 
is, what has the world moved to?
Notebook interfaces?

I'm just curious, and it will have implications for my design.

D