Concur, adding that to the end of a wing would likely negate any benefit...
The 787 and 350 wing flex should be designed to prevent the wingtip angle of attack creating separation of the laminar flow over the top, thus reducing the drag....I can see the sweep helping with the twist, but this is a tall order...
Anyone remember this?
I am looking forward to looking at the wake vortex from the 787, and the 747-8.