Triumph losing its "uniqueness"? Eventually, yes, but when Hardly sales 200k+ units a year (coupled with the suzu/yama/kawasakis) and Triupmh only sales around 9k a year I think we will have a way to go before our "uniqueness" is gone.
I do agree that if the vertical twins get more popular, the asian bike manufacturers will start selling a cruiser that will resemble our bike. not much originality comes out of the asian bike makers.