guys, i do really think that you're missing one important issue here.
especially considering the "Dr... WHO" Yamaho commercial it is evident to me that the main point of design-copying was to loudly shout about the fact that Yamaha is entering a new market (which is currently occupied by Beats)
any news about Beats spreads around verrry fast and wide. so this law-suit can actually be considered as a very wide commercial campaign.
and i do think that Yamaha can pay any price for such a commercial.
consider this:
you've got two identical looking headphones in the market, the only diference is SQ.
which one would someone choose?