This ep was obviously a shout-out to "Heat", but I hope they take it a step further when the inevitable Walter/Hank show down happens.
Would be ill for Hank to know Walt is Heisenberg, but not have any proof, and let him know "hey man, I know it's you, get out while you can before it's too late and I gotta come after you". And then Walt would say something like "if you come after me what do you think will happen to you?".
shyt would be

because a lot of people expect some dramatic show down as soon as Hank finds out. This would be more intense....kinda like Pachino and DeNiro had a small talk in "Heat" over coffee, but were actually threatening each other.
Fred.