I don't actually believe this.
Samsung TVs use Android, so they should not be anymore vunerable than any other TV using Andriod (ie, most Smart Tellys). They can only really hack the TV by hacking Android, which I doubt they can do without Googles cooperation. I doubt Google have agreed to anything because that would be commercial suicide.
Like wise, the claim that iPhones were compromised is doubtful. They are encrypted on the device at either end and not at the server or during delivery. If they could do that, why all the litigation about the San Bernadino killers locked iPhones last year?
The wikileaks claims do not have a ring of truth on this occassion.