iPad 2, worth it?

Is upgrading from iPad to iPad 2 worth the price? I didn't think so and this article doesn't convince me either. Dual core + double the memory boost the performance, yes. But is it good enough to justify paying another $500+, when the original device is smooth enough to handle the load from the same version of their OS? Multi-tasking? Switching apps? Just be patient a bit and iPad does it well too. Besides, I don't play games. Unless it gets better screen resolution or the OS would get too heavy for the original iPad, I wouldn't upgrade to a newer device.