Six to Seven years ago, everyone was talking about the demise of crop bodied cameras. People were very optimistic that the cost of producing sensors would continually fall and that FF cameras would become a lot more affordable. Maybe Canon have developed some manufacturing efficiencies (or benefits from increasing volume) and this is the start of that? Maybe its time to start offloading EF-S lenses onto "non-CR" people?
If those expectations / optimism was based on the assumption that sensors prices would go the way of microprocessor prices, I think misses two points.
First, computers sell much better than DSLRs / cameras with large sensors (in contrast to cameras with stamp size sensors). E.g. it makes sense for software companies to sell certain softwares (e.g. certain anti-viruses and office) with three licenses, because many households have that many computers. DSLRs aren't that popular, and if there are two or more DSLRs in a single household, chance are it's because someone uses them to make a living.
Second is cameras with large sensors are in a luxury / 'pro equipment' category, while similarily priced computers are in a household category. I wouldn't be a bit surprised if they would be priced as such, regardless of production cost.