You’ve merely scratched the surface, omitting the ceremonial. If you happen to have a piper handy, the haggis is piped into the dining room, piping hot and steaming. The Address to the Haggis is read. The server plunges his sgian dubh into the haggis, slitting the stomach poach and letting the innards tumble out. The server serves portions to the assembled multitude, often with oatcakes, and a dollop of Scotch on the haggis.
At least, that’s how we do it in the Piper household. One epicure insists that it needs a bit of Dijon mustard to finish it off, but he’s obviously non-traditional. The Scotch and oatcake suffice.