Just noticed that the article is from 1978... hard to believe more than 25 years ago! I'll wager that the Latin Mass was still a fairly recent memory in those polled at that time but today it'd probably be different.
Unfortunately, that is probably true. There was a better chance of having a "lay revolution" back then than there is now. In 1978, the majority of Catholics living grew up with the TLM. I would say by 1990 that has not been the case anymore. I also believe that while the older generation may have wanted to retain or return to the TLM back then, those same people who are still living today tend to either not care or have completely accepted the NO. I know my older relatives fit this category...i.e. they were mildly to vehemently opposed to the "changes" at the time, but they now embrace the NO wholeheartedly.
No, the TLM is going to boosted by my generation. The young families of the 20, 30, & 40 somethings are the future of the TLM and the Church for that matter.
Of course, if as many were familiar today with the Tridentine Mass as it was said before 1960 as were still familiar with it in the late 1970s, there might be even more demand for its restoration.
God bless you and yours.