I'm glad someone is doing it, but 3 thoughts.

1) It's Sad that this has to be done in the first place

2) This is functionality that Apple's included adaptor should have been (but with a 3.5mm port included)

3) is there anything stopping you from using other adaptors with this?

(like the lightning SD card reader and power, or USB Camera adaptor and music/audio, A/V (Hdmi/Vga) adaptor and power...and other combos)

If so, that would be even more useful.