From what I have played, there is a Slo-Mo bullet when you get a lucky last shot or crit worthy of being watched as it smashes into the skull or left leg of your enemy.
Will the executions be just as boring and anti-climactic as Fallout 3 and NV?
Or will we have 'somewhat' Skyrim style executions for all fighting styles? I'd rather watch my guy get all confident in his abilities, take a step forward... and pose badassedly as he points his pistol at dat ass...face... then fire a single shot that blows a hole through his face - his brain just gone in that cavity. Or just rip off the arm of an assailant and then bat his head off with it... I mean... if you have 10 strength... why not?
Perhaps I'll have to rely on modders for seamless VATS Executions.