For me, the real killer app of that sort of resolution would be resolution independence: current flat screens look crappy when you switch them to a non-native r

For me, the real killer app of that sort of resolution would be resolution independence: current flat screens look crappy when you switch them to a non-native resolution, whereas with that sort of PPI you could get away with it - and you wouldn't even need a powerful graphics card, because the screen could appear as a lower resolution device to the system.