Don't think Apple's forgotten about its little hobby, as the second generation Apple TV is getting an update today that lets users buy TV shows and stream them (in high definition) directly to the device, with the additional bonus of streaming access to previously purchased shows. That brings a new feeling of permanence to the cloud atmosphere around Apple's hockey puck, but it also means being $2.99 invested in rewatching that episode of Leverage down the road instead of opting for for a 99-cent rental. The other new feature listed for this update is access to the streaming si