Will you want to buy a PlayTV? We can't answer that just yet. Although we recently had a first-hand demonstration of Sony's digital TV tuner add-on for PlayStation 3 - and came away impressed - there are still two enormous and probably yellowy-orange question marks hanging over the device's future. How much will it cost? And - crucially - will you be able to play games while it's using the PS3's hard drive to record TV?