Not exactly new (this video was put up 3 years ago now), but then again, I haven’t really seen much of this being put into actual commercial use lately have you?
It still worth a look though — designers who may be into animation, or interface design might look into textiles like this as a new media niche.
I don’t know if I’d ever find use of one of these shirts myself one day except to maybe broadcast “Help me…call 911” every time I’m at the 3 mile mark on my weekly jogs.