The ability for high level diplomats to say one thing *on the record* to each other, and say completely different things in public or to their citizens has been completely compromised - To put it another way, our governments ability to lie to us has been hampered considerably. Oh, what a terrible world it is where the people who's job it is to lie to us can't do that convincingly anymore. If you look at it closely, it is the same with lawyers as it is with politicians. How can lawyers (and prosecutors) successfully lie anymore if forensics and bugging of their priveleged conversations keep getting better and more common?
After all there is a grain of truth in the saying that a politician (and lawyer) is lying if their lips are moving. It is their job to do that, and the job of the "free" press to believe them (otherwise come election campaign they lose all their advertising revenue)
It really appears to be the unfortunate result of better technologies - and scientific systems that seem to find truth and rule out lies.