I will go out on a limb and predict that the NATO leaders having agreed to ramp up their military spending to 2%, 4% whatever, will simply ignore their agreement, while the orange menace will come back, crow about how he was able to bend the European leaders to his wishes will get the high he needs and also forget about the whole thing. Just like Kim has ignored whatever he is said to have promised. And he got something concrete out of it, namely the cancellation of joint military exercises with South Korea.
I am quite certain that Trudeau has no intention of increasing military spending. When I moved to Canada a colleague told that the Canadian military was a joke; there was only one country they feared and there was nothing they could do about it.