Accidentally clipping the power cable is something I definitely got used to not worrying about anymore. I'm loving the single mother-of-all ports USB-C will provide but I highly appreciated the magnet component of MagSafe..
Off the top of my head the only concern is: How do you turn on/off the flow as the magnets lose contact? Last thing you want is arching as it comes apart.
Apple MagSafe connectors are on the same voltage (20V) as these new Type C connectors, although Type C seems rated for a higher current (5A).
Looking at the pinout, the GND and VBUS are a bit longer, so will disconnect last upon removal. This may be to allow for the voltage to be dropped in anticipation of a disconnect, but you'd need enough intelligence at the power supply end to notice that. Lowering the voltage prior to disconnect would reduce the arc size.