jeremy2020 :
so..they're just going to release a new version of xbox one every year? All the joy of PC upgrade in a console!
This is pretty much the same thing that Sony has done this generation as well, with the PS4, PS4 Slim and PS4 Pro. The Slim or S versions are mainly just intended as revisions to save manufacturing costs and reduce the size and power use by making use of newer hardware. 16nm manufacturing processes are now available for the chips, so why not make use of them? Those with an original model aren't expected to "upgrade", as functionality-wise, they're pretty much the same as the original unit. This has been done with almost every console generation ever.
The Pro and X versions are a bit different from what we normally see, in that they have significantly more graphical processing power from the original versions of the consoles, but that seems like it will largely be used for running the same games at higher resolutions, and perhaps graphical settings. I doubt that they'll be releasing yet another version with even faster hardware this generation, though it is likely that there could be another minor revision.
And these consoles
are nearing four years old already. Prior to the last generation, most consoles were only out for five or six years before their succesor would be released. If you look back at the original Xbox, that console was only out for four years before the Xbox 360 was released. Or more recently with the Wii U, which has been followed by the Switch in less than four and a half years.
The only potential issue for those with the original versions of the consoles, or even the slim versions, will be if developers start targeting the new higher-end hardware, then scaling back things like resolution or scene complexity, or compromising on frame rate for the lower-end hardware. On the positive side, this could mean PC games might not get held back quite as much by the limitations of eight year old console hardware though, as they were last generation.