flicking between Terminator: Salvation and Cadillac Records (the story of Muddy Waters and Chess Records, who helped bring Blues & Chuck Berry to the masses)
from what I've seen of T:S, it's pretty bland
made more so by the fact Christian Bale (when not screaming at people) got the director and writers to shoehorn in the whole John Conner part when the film originally was just about Marcus and Marcus learning about John before he eventually becomes him at the end in order to continue the Resistance
Cadillac Records is a more than basic bio-pic about Chess Records, Muddy Waters and how they helped shape popular music by bringing the Blues out of the South and onto mainstream radio (though played mainly in the "coloured" play periods)
they also helped launch the careers of Howlin' Wolf, Etta James and Chuck Berry
if you like the blues and music history, is a good watch