[Gunslinger]

The possible solution to that is of course to adopt 'cloud' storage of saved shows, essentially a personalised streaming service where you keep access to shows you want to watch at a later time - like the 'watch lists' you get on Amazon and Now TV. However I suspect rights issues plus arbitrary rules on BBC on demand access would probably intervene.
Not to mention the one big reason why IPTV will not remove the need for linear TV channels and local storage anytime soon - the fact that it is not 99.999% reliable, and subject to variable factors ranging from server capacity right through to the quality of the local WiFi network. Over the past 15 years or so I am sure we have all experienced broadband issues ranging from a few minutes to several days. During that time, the basic linear cable TV service has remained rock solid, albeit without some of the interactive bells and whistles.