It will be fun in the future to hunt through kiloware and see if any of these survive with the selvedge still attached.
I have been wondering how these will be collected in the future (or present) without the booklet cover. Most people (I think) just collect stamps and if they want to collect the varieties then they get them and now-a-days create their own page for them and display them
I suppose it depends on how these survive, mint and used. This is one case when used will be rarer than mint with gum.
Will folks collect just the one stamp with selvedge or two stamps? Most likely will be one stamp on envelope as that is the domestic rate now (57 cents). The Us rate is $1.00 and the international $1.70 all basic under 30 grams weight rates.
So not many will go to the US for normal weight letters but some may go to international destinations.
It is unfortunate how these have been designed as to perforations. Looking at the below scans of different booklet panes, it is clear that the only easy way to use these stamps will be to detach the end pair vertically. Just one stamps will most likely end up having the selvedge ripped through or removed. But, then we wouldn't have these fascinating numbers on our selvedge if the perforations extended all the way to the end perhaps. One must count one's blessings.

Another thought, perhaps this new-to-Canada idea of differences in stamps detectable only by the numbers in their margins will start a movement of sorts to include all stamps' selvedge and margins, especially those with interesting bits in them, as being more collectible and perhaps priced differently also.
Are we on the cutting edge or just a bump in a long smooth roadway that will be ignored in the future. However it turns out, I am having loads of fun right now.