Vinyl, metal and wood replaced stone and marble as materials of choice. The trends were already there. One good aspect of EACW is that it has spawned many good discussions in parishes. Most renovations I've seen mix the old with new ideas. In most places, tabernacles are still in naves not chapels.
Fonts are all over the place and in all sizes.
It shows we're in a transition period and at this time, nobody has all the answers. In my opinion, it would be premature for the NCCB to come up with strict guidelines for environment and art. I don't believe the Vatican has the competence to make determinations for the entire church. Too much is still up in the air. If the eucharist is truly the center of the life of the church, our architecture should reinforce this.