The 787-3 was going to have winglets.
Personally I think the blended winglets look good on the 737, 757 and 767.
I was on a Ryanair flight last week & when I got off I looked back & compared it to the A320 next to it & I have to
say the Airbus looked more pleasing, it just had small chevrons rather than the winglets that look out of proportion
on the B737-800 IMHO. The B757 looks only okay, but deffo not the 767!
Well these singlet devices are not designed to increase the aesthetics of the airframe, they are there to improve the performance and efficiency. Any aesthetic improvement/degradation are subjective and a matter of personal taste, and irrelevant to their purpose.
You are of course correct in all you point out. If it was found that a forty foot square cardboard box supper-glued to the top of the
airframe saved a few hundred thousand dollars a year in fuel it would be taken up by all the airlines, we all know that. Since most
of the winglets in use spoil the lines of an aircraft save for the A350 perhaps., my argument was the folding tips in use at the gate
on the B777x ( ridiculous argument I know ) will do nothing for its looks. It`s all down to "personal taste" in the end, & I can`t discount
that I could be horribly aesthetically challenged too.........athough I did think Concorde was particularly good-looking