Aside from Baron Baltimore being less an anomoly and more a sign of landed gentry in the USA, I suspect it's very likely the confederation of north america would have become the logical heartland of a british empire/co-dominium and that at least two major wars of the 20th century would have taken different shape, if only because the need for a Pearl Harbour event to bring the US into the war would have not been present. Canada would be provinces of a unified (or not!) landmass.
I hesitate to say the slaughter of indigenous would not have happened, frankly the British are simply better at hiding their iniquity, I have little doubt they would have pushed tribes aside to occupy the land, every bit as much as the US states did. Only New Zealand stands as a treaty outcome (Hawaii was superceded by circumstances beyond their control) and it's far from perfect.
On the other hand since Australia exists in part, to solve the overflowing prison hulk system, a function of loss of ability to send people to America, my home would either not exist, or be french territory. Quelle Suprise!
German land holdings would have looked very different too, and Belgian. The white man's burden would have taken a very different shape if the British state was confident in the American landscape. India I suspect would have worked out exactly the same: the east india company had to be pushed aside well after the US thing, that wasn't going to change much.
I suspect the British would not have been able to resist taking up land across the Bering Straights. So what we think of as the "German problem" might in fact, have been "the Russian problem" re-written. There isn't much the Tsars could do if Vladivostok turned out to be Georgetown.
Perhaps not such a bad outcome?
George Bernard Shaw had a crack at the US coming back into the fold in "upset the apple cart" which is at least entertaining.