Either they r increasing bitrate of channelsin these tp's to improve picture quality thus theu r increasing bandwidth or they r planning to add new channels and thus increasing bandwidth. Chances of second case being true r more as earlier too bandwidth was ample and to increase bitrate they were not needed to do this.
Wait n Watch. May be they will again launch many channels in bundle.
Also i have Videocon and tata sky both active on my same tv and Videocon has better picture and audio quality across all channels. As tv size gets bigger, tata sky must be undet pressure to improve picture quality