I don't expect the price to stay at the current level, either.
Right now, it has no real competition - there is no camera out there, SLR or mirrorless, that can match it for both resolution and speed/AF simultaneously. Many can do one or the other, but not both.
But Canon isn't going to take this lying down. They will release a competitor, probably within the next year. Quad-pixel AF is in the wings. The Olympics this year may or may not go ahead, but there will be a soccer World Cup next year, providing incentive to release a similar camera, as well as a few mirrorless superteles. We don't know what the A1's weather sealing and construction will be like, but it's a safe bet that the sealing on Canon's top-of-the-line model will be solid and the mechanical parts reliable
With the release of these cameras, slowing development in SLRs and existing action SLRs starting to get older and wear out, there will be many end-users considering their future direction on the hardware front and a move into mirrorless, and the decision on which lens/accessory ecosystem to buy into is one of the biggest decisions, with the potential to influence sales and brand loyalty for the next 20 years Canon knows this from their own experience with digital SLRs, where they got an early market share advantage, then kept it, even when their cameras no longer technically kept up. Sony surely knows this, too, from watching Canon's experience with DSLRs, and from their own experience getting early points in the mirrorless game. If Canon can release an equivalent body for 5000-5500 USD, it could create a real price incentive for customers to move in Canon's direction, and put huge pressure on Sony to reduce the price of the A1, not for profits now, but for market share down the track. And, of course, it means that Sony needs to get the weather sealing, mechanical reliability and firmware/UI right. You can afford to have an A7-series body that isn't as sealed as a 5D or D850, if it has other advantages. But you can't afford this with the A1, when you have a competitor you know is going to get it right and are targeting customers who will care about these things.