Netflix may suffer from limited mobility

The Netflix streaming app is now available on over 800 different devices, which is nearly double the number of devices that the app was on only six months ago. Yet for all that growth, Netflix is suddenly looking vulnerable in mobile video as new competitors with built-in advantages like Verizon and Amazon start staking claims to the video-streaming turf. Given the growing importance of mobility to the streaming-video business generally, that vulnerability could eventually grow into a broader competitive problem for Netflix.