No French Revolution, no Napoleon. That would have to have huge effects on Europe, not even considering what was going on here. Great Briton would likely still be the empire on which the sun never sets.
Would WW I have occurred?
May have been worse for Europe. On the other side of the coin, in order to put down the rebellion here for good, England would have had to commit ships and men that they needed elsewhere to fight France and Spain. With their resources over here, England could have lost important wars on that side of the pond.