For music, you can get away with headphones, but for cinema you have visuals and real imaging that corresponds to the visuals. That you really need directivity. Even for ear/head phones, more bass doesn't mean good clarity. You don't want dipped mids and bloated bass like for music, but like anything, large sub-bass really helps. I recently tried out some cheap #1 seller bluetooth earphone from Amazon and it was terrible sounding for dialog with video on Netflix, bloated bass and unclear mids. So, quality headphones helps, but not as much as speakers.