i have a subscription for Now tv but don't have a box so at the moment can only watch it on my laptop . is there a way of watching it on TV without getting a box? i don't really want to make the investment as i am not sure if i am going to keep the subscription going . we have a quite new Sony telly but the Now tv guidance refers to watching it on a samsung tv only . the community forums refer to something called Chrome cast but i have no idea what that is . any advice much appreciated .