While not optimal it is certainly useful. I agree that a true newbie to exercise of any kind would need more one on one attention. The online option does open up possibilities for a client who travels often or those who are moving and are reluctant to end the relationship with you. Face Time and Skye etc. do make the idea of ‘distance training’ a tad more acceptable in that at least you can observe your client and get a sense of how the program is working for them.
I imagine that this idea is only going to grow.