Johnson will smear lipstick all over this pig of a deal and declare it a triumph. Those who want to believe it will do so and the only early evidence of the huge defeat that it really is will be some delays at the ports as customs officers learn their new jobs. The real bill will come in later and almost invisibly, in lost trade, investment and opportunities.
The last official British government estimate was that 15 years from now, the British economy will be between 5 per cent and 7 per cent smaller than it would have been as an EU member (but still a bit bigger than it is now).
That's not the raw material for a counter-revolution – and besides, any projection about the economic situation in 2035 is really pure guesstimate. One Covid more or less could make just as much difference as Brexit.
All one can say is that the British economy will not "prosper mightily" outside the EU, as Johnson promised but it won't collapse either. And then, in due course, the younger, pro-EU Brits will become the majority, thanks to the magic of generational turnover. But until then, if Britain comes knocking at the EU's door asking to be allowed back in, Brussels should say "no".
What really happened on December 31 is that the European Union was finally freed to develop in the way that its other major members clearly want. The goal of "ever closer union", anathema to English exceptionalists, is back on the agenda.
There is ambivalence in every member country about the idea of creating a semi-federal European super-state but, in a world where democracy and the rule of law are under siege, most people can see the need to strengthen the European Union. Last July the EU's leaders took a huge step in that direction: for the first time they agreed to borrow collectively on the financial markets.
France and Germany were all for it and Italy and Spain needed the money to finance a trillion-euro aid programme to help them through the coronavirus crisis. Those four countries now contain more than half the EU's population and they outvoted the "frugal four" (the Netherlands, Austria, Sweden and Denmark) that opposed taking on debt to support "feckless" Mediterranean members.
If Britain had still been a member, it would have vetoed the measure because it infringed on the UK's sacred "sovereignty'. French President Charles de Gaulle, who vetoed British membership applications twice in the 1960s, was right: England does not have a "European vocation" and it should not be allowed in.
The financial precedent that was set in July opens the door to a future EU that acts much more like a state. Even a common defence budget is now within reach – not something vital in military terms but a European army would be a hugely important symbol of unity.
The United States may be back soon but the world could certainly use a second powerful advocate for democracy and the rule of law. Brexit may be giving us just that by freeing the EU to move on - and we should be grateful.
• Freelance journalist Gwynne Dyer is author of Growing Pains: The Future of Democracy (and Work).