SPOILER ALERT!!!
Tony DID die. You witnessed his death through his point of view.
Remember the end of last week's episode when Tony thinks back to him and Bobby having a conversation on the boat at Bobbys cottage? They were talking about "when it happens (getting whacked), you probably dont even see it happen, everything just goes black"
Tony got whacked. Everything went black. It's all over!
I thought about it and I think this is really what was meant by the screen going black. The guy sitting at the counter was looking pretty nervous too.