Roxy, thank you for going into the history of the term 'marquee.' It is indeed a bastardized (or altered) term dating from the French "marquis" (pronounced the same way in French, though the French for our 'marquee' is "marquise" prounounced 'marKEEZ') though that word can also mean a canopy or tent for a lawn party or wedding, or it be a title of nobility, when it is usually capitalized.
The Theatre Historical Soc. of America has published the quarterly MARQUEE magazine since 1969 and has even had one of their ANNUALS on the subject of marquees. Like you, we always distinguish between the three customary parts of a marquee: lowest was the Canopy, then the Attraction Boards were mounted above it, and the Name Sign topped it all. If there was a Vertical Sign, it rose above the marquee, though in some palaces, it was part of the building itself. Sadly, as you point out, this old form of ornamentation (they became quite elaborate, what with bronze and stained glass in some cases) is disappearing as they become less relevant to today's drive-by patrons. The curb side sign (usually a Pylon, Attraction Board(s), and Name Sign), has taken its place. It is odd that the modern cinemas could not be against the sidewalk like the earlier theatres, but a study long ago found out that people like the parking lot to be in front of a store/theatre/mall, rather than in back of it, so now most such are fronted with huge lots, unlike the early shopping centers which had lots in the rear of the stores.
Coincidentally, T.H.S.A. will be inagurating a new feature on its web site in the coming months: "A GLOSSARY OF THEATRE TERMS." We hope to cover the entire scope of the buildings and physical appurtenances to them, as opposed to mention of the performing arts world of terms. The aim is not only to help the public, but to take a more scholarly approach to 'codifing' the jargon so many hear, but also misunderstand. Keep an eye out for it at:
www.HistoricTheatres.org