So far I know of:
The Immaculata
St. Peregrine
Have freestanding "altars" (an antiquarian backdoor for tables in the Modernist trickbook).
Who is behind this push and when did this start? Interesting that both of these instances are after Pagliarani took the reins from +Fellay as Superior General. Are other megachapels remodeling in this mold that anyone knows of?