Taken alone it could be viewed as light hearted. Taken in the context of their past behavior it's another example of arrogance. Look at what Ballmer said about Google and Eric Sshmidt in the early days. Look at their complete mismanagement of mobile. They always believed they could just swoop in and win the market. How else can you explain the many years after iPhone was launched for them to launch a competitive mobile OS. I would call their approach to mobile an embarrassment. How could the worlds largest software company release such crap for so long? How could they go to market with a confusing array of mobile options (looking at you RT)? They thought they could win just because of past performance, and thus had no sense of urgency or humility, and that is why I think this is arrogant.