They tend to bump up the prices at key points that are not just spec bumps. E.g. the MBA redesign, the 2018 Mac mini, etc. Always an upward trend to give more perceived value. Mentally, people don't take well to price reductions as they perceive cheaper is inferior. If right out of the gate an ARM iMac is cheaper than the Intel iMac then you're going to be on a loser. You need to say the increase in price is due to feature X. What X is is all about marketing. It's psychology.
Thats not really sustainable though is it? We'd end up paying as much for a Mac Mini as we do for a car in another couple of decades.
The price point will tell us a lot about Apple's ambition for market share. Sure, they could go business as usual and bump the price a little while bumping performance a lot and they'd likely gain a little market share if they really stick it to Intel/AMD based machines. This boost won't last all that long as the industry scrambles to catch up with them. Even if they never quite catch up, they can be 10% slower if they are 35% cheaper.
Or Apple could go aggressive to capture real market share gains. They could look to compete more like they do with phones or tablets.
If they released a MacBook Air that was significantly more powerful than 80% of PC laptops on the market and sold it for ~$800, they'd make a huge splash. The current model starts at $900 for edu customers so this is not a big stretch at all.