People are frustrated the system is a negligible improvement over the original 3DS so they have little reason to upgrade, and are fearing Nintendo will only release content compatible with the new system so they miss out on future games.
I think it also reflects the growing resentment of Nintendo's uninspiring hardware direction. It's beginning to feel like the hardware offers no purpose other than adding an additional fee to play Nintendo software, which would be better played on superior devices. The "NEW" 3DS really is the culmination of that philosophy.







