I already pay for alarm services so if they added 4sight for $10/mo, alarm for $15/mo, hardware etc... I don't think it would be unreasonable to pay $100/month but would have to see new hardware and integration thats noteworthy.
The problem with starting this now, is that most tech companys have already institued this with services that are necessary (i.e. alarm) so hopefully SnapAV will have 'other' linked services they can sell to the consumer (things they believe a consumer would want but doesn't know it yet) and entice such expansion of the home.