STB upgrade will be no good unless they seriously upgrade to at least full HD at a decent bitrate.
I had a few seasons of GOT on AppleTV (US account) after getting through them I had to resort to Sky's OnDemand with a noticeable downgrade in quality (SD). My wife total non techie will usually watch anything, but even she commented on Sky's atrocious picture quality after experiencing a few seasons on AppleTV..