a) The market will figure this out. If developers don't want to code in just Cocoa touch or make apps for other platforms a priority because the language is easier, they will.
b) Things are in such a nascent stage. Android is growing like a weed. A suit like this might make some partial sense a few years down the road if there was enough data there.
c) The department of justice will probably hire a bunch of people with no real domain expertise to look into the subject.
d) The potential precedent set could be scary. @archgrove mentioned the xbox example. So now, microsoft might HAVE to allow us to build XBLA games using any tools out there. If I were microsoft, I wouldn't want sub standard crap getting in there.