Not even close. The days of movie premieres getting 16 million viewers are long gone. However, the big big movies still attract decent ratings, especially when hyped and shown at or near christmas.
Some recent(ish) viewing figures:
Batman Begins (4.87 million viewers)
The Incredibles (5.57 million)
POTC: At World's End (6.41 million)
Shrek the Third (7.80 million viewers)
Indiana Jones IV (7.91 million)
Also, Mamma Mia! (6.01 million)