I hope that you are very wrong on that front, I really do kaurhug In fact, I'll stick my neck out and say blatantly that I think you are wrong, in all sincerity my friend.
I am a non-Sikh, however I believe that it would be a travesty if Sikhi were allowed to wither to the extent that you relate. It is a religion which I feel has much to offer to humanity. Unlike other faiths, which have tendencies both towards exclusion and inclusion, the teachings of the Gurus are fully inclusive of other paths. To have that lacking in the modern age, when peace between members of different religions is more essential than ever, would be a sore loss.
Sikhism, as it currently exists, has I think much in common culturally speaking with Judaism. Both Judaism and Sikhi are strongly tied, at times, to a specific ethnicity, people, culture and shared heritage. Now, there is nothing wrong with that, its actually beautiful to maintain such traditions, however it does mean that the Jewish and Sikh faiths have not as yet reached to the same demographic spread as say Islam or Christianity, which are less culturally tied.
I think that all one will witness in the coming years is a movement away from a culturally-bound, Punjabi-specific form of Sikhi too a much more diversified and universalized form of the religion, which despite retaining a strong Punjabi contingent and heart, will have branched out considerably and become a faith much more in tune with the original teachings of the Gurus which teach one to embrace all humanity, all religions, all cultures, all races, all countries.
That is where I see Sikhi heading and it isn't a bad thing at all, although it will change many peoples' perception of Sikhs (who are often seen as a "people" like Jews rather than an all-embracing religious identity without racial/ethnic attachments such as Christianity).
