Manhattan Aesthetics & NJ, Bkyn, Qns high rises

This question is simply about aesthetics, nothing else.... Manhattan's grand clusters of high rises have are unique in their setting...an island viewed across broad rivers, no city on the planet can give the impression that you are entering a special place as does Manhattan, the towering Oz across the water. In the US, San Francisco may come in second in that sense of "place apart", but SF mixes low rise pastel and white structures strung across its hills as well as its skyline to achieve that sense of draw. Not so for Manhattan: it is the man made that dominates. Therefore the question is: WHAT EFFECT WOULD MASSIVE HIGH RISE CONSTRUCTION ON THE OPPOSITE SHORES OF THE HUDSON AND EAST RIVERS HAVE ON HOW WE SEE (AND APPRECIATE) MANHATTAN AND ITS SKYLINE? To elaborate: what if the type of extensive high rise development one see ins Jersey City and, to a lesser extent, in downtown Brooklyn were to excelerate and spread along the Jersey, Brooklyn, and Queens riverfronts, large scale and huge. What if both the East River and the Hudson River became canyons, Chicago River like but much wider. Certainly the canyon effect would be dramatic (safe for what effect it had on views of the Palisades), but WOULD IT SERIOUSLY COMPROMISE OUR SENSE OF MANHATTAN AS DESTINATION, THE MIGHTY ISLAND DOMINATING ITS SETTING OF RELATIVELY LOW SCALE DEVELOPMENT ACROSS FROM ITS SHORES? Can Manhattan's skyline retain the "magic", its allure, in face of similiar structures across the shore?>