We can already say first-hand that Apple wants the majority of users who have an Apple Watch today to enjoy the novelties implemented in the new watchOS 6 operating system. In any case, the important thing for many of us is not really that it allows it or not, but the most important thing is that in addition to allowing it to work well and it seems that in this case it will.
We can't say that the current watchOS version works as smoothly on an Apple Watch Series 3 as it does on a Series 1, so the fear in this case is more in that sense than in which Apple itself allows or not to install this new version of watchOS 6 on most Apple Watch.
But we are going to put aside the user experience that this new version can give us in Apple Watch models and we are going to see the list of compatible models. In this sense, there is not too much fear on Apple's part and the list is large, so large that it encompasses all models except the original Apple Watch or Series 0. So Anyone who has an Apple Watch Series 1, Series 2, Series 3 and obviously Series 4, will be able to install this new version of the OS.
As I said above, another topic will be to see the general operation of these watches with the new version that will arrive in a few months and above all the doubts are focused on the Apple Watch Series 1 that today, although it is true that it works with watchOS 5. it costs a little more than the rest. It may be that Apple even improves the performance in these older models with the new version, we will see what happens when it is officially launched since the betas are always more unstable and logically from a beta we will not draw clear conclusions. In short, what really interests us is that Any Apple Watch from Series 1 will be able to install the new watchOS 6.
Good: anyone with a Series 3 but an iPhone 6 cannot install WatchOS 6, right?
A greeting and thanks
I understand that yes, I have an iphone xr that I got on sale in the Soriana brochure this week and the seller informed me that it would be compatible.