This complaint is spot on and what I'm finding is that folk wanted a Smart TV to do so much more. That is, folk wanted a browser on par with a Windows PC. That didn't happen.
As to BLINKBOX, that would be up to them to get the app on the TV, not Samsung. If they did it on prior models, they are likely working on newer models.
HOWEVER, not all Smart TVs are created equal. I ran into one Smart TV that did little more than show movies and pictures from USB. Yes, it was smarter than other TVs.
I've just upgraded to a 43" Samsung Smart TV.
I'm very disappointed about the apps.
I do have All 4 (4 On Demand).
The BBC IPlayer icon is there, but says it's not available.
There is no ITV Player & no 5 on Demand.
If I web-browse them & find them, it says they need Adobe flash installed in order to work - which it won't do.
Also, regarding film viewing, all the apps seem to have a monthly rental (Netflix, Amazon etc. etc) which is no use to me. I really need a pay-as-you-rent app like Blinkbox which has thousands of titles. But the app only works on Samsung Smart TVs from 2011, 2012, 2013 & 2014 and NOT on TVs bought this year... Hmmm !
Anyone got any other ideas? Or do I just resign myself to getting all those above apps & films on my laptop & connecting it to my new TV?
Kinda defeats the object of a Smart TV doesn't it?