Absolutely vital reminder:
Patents do not automatically equal products which will actually be made.
Patents like this are essentially a company 'bookmarking' a theory so they get first dibs on making it if they later wish to.
Patents are for the business, not for the consumer.
Sometimes companies file patents purely to stop someone else from making something, even if they have no intention of making it themselves.
The vast majority of the time, patents for lens designs simply mean one or two designers sat down with a piece of paper and did the math, with absolutely no concern over whether or not such a thing can actually be produced, let alone will. Canon's designers could draw a 12-800mm f/0.95 Macro IS with built-in 1.4x extender and file a patent with that drawing; that lens still wouldn't get made.
Patents do not mean a product is definitely going to be made.
Patents do not mean a product is already being made.
Patents do not mean a product is anywhere near release.
Products which do get made rarely match their patents 100%.
When a patented lens design does get made there are typically at least a couple of years—but it can be many more—between when the patent is first drawn up and filed and when working prototypes start being seriously tested, and at least another year before a successful version can be mass-produced and sold to the public.
Faster zooms are great and the 28-70 f/2 is already the thing which is selling me on the R system over any other mirrorless system; a 28-105mm f/2 has been my dream lens since as long as I can remember and the idea that f/1.4 zooms may exist within the foreseeable future is extremely exciting. However, a patent is a patent; a patent is not a product. Canon have filed hundreds of lens design patents over the years for lenses which never even had prototypes made. (The 28mm f/1.4L being my personal favourite never-to-be Canon patent.)