Can we expect 'Mooners' to solve very earthly problems such as future EU/US relations?
Because in the end, when we come to the point of relations between Americans and Europeans, this is what it is all about. Can Washington and Brussels help solve the growing number of disputes between USA and EU? Well, the fact they both are from the Moon does not push for optimism, because it puts both of them very far away from us and our problems. It even seems that both their differences and similarities tend to prevent any problem to be solved soon.

Even the way Washington and Brussels look at God differs
Meanwhile as they do not see the same sky, they tend to understand differently what is going on. Washington tends to think that serious Europeans/Americans relations started with WWII (as if before they were just 'politically incorrect'). While Europeans tend to think that WWII era was definitely closed down with the end of the Iron Curtain, and a new era in EU/US relations thus opened.
They also do not consider God in the same way. While Washington expects all Americans (and the rest of the world) to believe that God is American. Brussels tend to argue that God has nothing to do with being European.
They equally differ in the vision of the future. Brussels, being on the dark side, does not know how its future will look like; while Washington is full of certainties on what tomorrow will deliver.

Washington and Brussels reflect one another across the Atlantic Ocean
Not only their differences, but also their similarities tend to separate them.
They both reflect an old dated way of organizing power, centralistic, rooted in XVIIIth century visions, more and more at odds with societies trends for decentralization, networking, autonomy.
They both nurture the Empire dream, which requires an opposing force, an opposing Empire to be able to exist and mobilize forces and people.
They both speak a lot of values and principles, such as democracy, freedom, … while caring more about power, influence and money … which fits much better with their dwellers, essentially made of bureaucrats and lobbyists.

The true 'Mooners': the 'Baby Boomers'
And last but not least, both cities are run by the true 'Mooners': the 'Baby Boomers' generation. This generation (at least in politics) never could leave up with its dreams, and keeps on confusing wishful thinking and objective assessment. They compose most of both capitals 'think-tanks' where thinking is light while tanks are full. They both can conceive 'grand strategies' where they take command of 'History'. Brussels' talks in the mid-90s about 'being Europe's makers' may echo today's talks in Washington about the 'US Empire standing the test of time'.

It took about 5 years for Brussels to brutally discover that it was much more complicated to build Europe than what it looked like from a 'Mooner perspective'. Let's guess that similar experience will be developed by Washington in the coming 5 years. And in between essential Transatlantic innovations will happen neither in Brussels, neither in Washington.

But of course, despite all that, much may be expected from next EU/US Summit in Washington!