Gregorian Chant's Comeback or Everything Old is Old again, but Hip

Have you heard the news? It seems as though Gregorian Chant is making a comeback in Catholic services. After being thrown out of many Masses when Vatican II said it was perfectly acceptable to hold the Mass in the vernacular, this cornerstone of Western music is experiencing something of a vogue. It seems as though there are two forces at work here:

1. Catholics my age are growing tired of hearing the same music at home, in their car, at the dentist's office, and at church. They are longing for an experience that transcends everyday life and find that the unmeasured, unhurried, half-understood Latin lines of traditional monophonic chant accomplishes that transcendence. (The question as to why Gregorian chant has a mystical feel to it is best left for another post)
2. It also seems as though listening to and performing Gregorian chant reduces stress. Hmmm, imagine that - prayer and meditation can reduce stress. But no one has done studies to see if Gergorian chant's use in Halo reduces the player's or the Master Chief's stress levels.

Looking back through history, these trends wax and wane between more traditional forms and newer forms and eventually, elements of both end up in a new fusion (so we don't sing Gregorian chant now the way it was sung 1000 years ago). Still, it is an interesting phenomenon. And since Protestants seem to follow their Catholic brethren in musical use, what's next, are hymns going to make a comeback?