Hello David,
we are currently looking in to, as stated here in this post, more efficient aircraft (i.e. maximizing efficiency). There are many ways to complete this but that's easier said than done; one way is looking into structure. Look into the joined-wing aircraft which was patented by Wolkovitch years ago. An unfortunate drawback to aircraft such as this (also another aircraft being researched, the oblique wing) is appearance: not everyone wants to ride in a "weird" loooking airplane as was the case when canards first arose. I can almost guarantee that we will still be using the "cigar" shaped fuselage at 2040, just running better numbers where possible (e.g. loading/unloading passenger times).
Hope this helped a bit.
Regards.






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