I have 2 Premieres and 1 HD system with lifetime, but I'm interested in getting rid of the HD to gain the streaming ability the Premiere's have. However, I noticed that Tivo is releasing some new products this summer: Tivo Stream and IP TV. I understand Tivo Stream is for streaming to iPad, iPhone, etc. What exactly will the IP TV do? Will it need the 4 tuner premiere to function properly? I don't want to buy a regular Premiere if the IP TV will accomplish what I want in an easier way.