First thing that comes to mind is flexable controls and feedback for a grip based remote. Steering wheel, bicycle grips, motorcycle grips with feedback available right there. Possible for remote controls, bluetooth control for audio etc. Or for a GoPro type remote. Embedded in a grip with flexible contact pads and feedback (leds etc) right there.
It would also make good integrated dog collar components. light up at night or remote commands (recordings of your voice saying commands activated via remote) or GPS. It combines the e-textile part but allows for more of a waterproof type aspect as well. Possibly even a remote for the light up. (I have a black dog got to have a glow collar at night or she is lost in the shadows but its bulky.
Flexible contact thermometer for babys and toddlers with graduated led for readouts or other readout mechanism (e-paper maybe)