Rarely is very much new.
Of the 45 films Warner Brothers released in 1940, 15 of them were remakes including Bette Davis’ The Letter and Errol Flynn’s The Sea Hawk. Remakes, reboots and sequels have always been a big part of what is produced.
Is Hollywood producing more reboots and remakes than before? Possibly, maybe, slightly.
Are large audiences as willing to spend their money on an unknown story? Apparently not.
What might be new are the “properties” that get spun-off into movies now. Battleship, for instance. Have you heard my pitch for Hungry Hungry Hippos: The 3D Experience?