What makes a good laptop? Well, I can give a pretty haphazard answer to that. But if I were to give a broad verdict, I would say any PC that gets the job done without nuking your wallet, heating like a pan, and lasting at least a full day without forcing you to hunt for a wall socket, takes the cake. Apple has mastered that art with the MacBook Air , and to such an extent that shoppers have no qualms spending on two, or even three generation old, machines. Windows, thanks in no part to the...