Someone keeps thinking that in the future all cameras will be full frame?
I think crop cameras are safe, too. If anything, the comments above about "pro" users makes me think the days of FF cameras might be numbered.
Crop sensors have improved significantly over the last few years. And, if Canon was to implement the latest improvements in manufacturing techniques and sensor design, we'd struggle to see much IQ advantage of a FF sensor over an APS-C sensor (in fact, with other brands, you struggle to see the difference now). DOF differences and shooting at very high ISOs and more MPs will still be attractive incentives for crop camera users to change to a FF camera. But I suspect a growing number of people will decide that crop cameras are good enough.
To differentiate themselves in a competitive market, I see more studio-based and wedding photographers moving to medium format and abandoning 1DX/D3X/D4S style cameras. (And in the next two years, there will be at least another two new, smaller, medium format systems introduced in the 1DX price range to attract these photographers.) Many wildlife and sports shooters will prefer the extra "reach" of a 7D3. Current 5D3 users will continue to transition to Sony and Fuji mirrorless systems. I don't know if there will many people left to buy Canon FF cameras.
How does this all tie into this topic? Canon have only made muted sounds about medium format and that doesn't give people looking for a medium format option the confidence to stay around for a bit longer. They will move to other brands. A very high percentage of mirrorless buyers are DSLR owners, yet they are also leaking away to other brands. We can tell from the rumors posted here and the details of patents that Canon has the ability to make class leading crop sensors, but we haven't seen much evidence of Canon investing any $$$ in manufacturing plant and instead we have Canon polishing up the same sensor they've had for how many generations of cameras? This leads to website stories about how Canon is falling behind, which might lead people doing research on their first camera to choose another brand. Added to this, there hasn't been a noticeable drive to develop EF-S lenses anyway. And with the Eos-M, a quick look at the B&H site suggests you can't even buy an Eos-M and if you already had one and were after another lens, I hope it is the 22/2 that you seek as it is the only one available.