Playing on a real system is usually a much better experience than playing it on a computer, sure, some PSX and Wii games can look much nicer with the proper filters, however, handheld games don't usually fit into those.
While the 3D might be a gimmick, so is the gyroscope and a lot of 3DS games actually use it.
The gyroscope may be needed by many games, but it is not impossible to emulate.note that the motionplus feature of the wiimote is pretty much emulated in soever unofficial builds of dolphin emulator.it may not be perfect but people have been able to finish games that require a functional motionplus.