Airtel DTH SD channel picture quality is too compressed to accommodate more channels therefore IPTV may improve picture depth as compared to DTH,so it is better to wait and watch
My airtel fiber technician just told me that airtel iptv is now also available for installation in patna with new black connection. So may be it is now available in most of the cities. You have to enquiry about this to sales person. May be website is fully updated right now.