Yeah that's definitely quite interesting, it's pretty similar to what Microsoft was trying to do with putting Windows on phones I the Early 2010s. I think only really Sony ever adopted it for their phones and they never sold well, but I thought it was interesting at the time.
There's a decent amount of ARM laptops that are running Windows so maybe that it where the laptop market is heading, it makes sense because the big.LITTLE cores ARM SOCs use are specifically designed to use as little power of course. A Chromebook I had a while ago had a (iirc) Tegra K1 ARM and that had great battery life even for a Chromebook.
As far as pricing on Apple products goes I don't think you will ever convince me they're good value for money :P. Sure 3x the price of comparable products is am exaggeration, I would say it's more like 1.5 or 1.75x the price normally. I mean saying it's "good for web browsing" essentially just means it doesn't have good components but these things are priced in the range of what like $1000 right, you could get a nice chromebook that also has an ARM CPU and is good for web browsing as half the price. I'm sure MacOS on ARM is a more useful OS than ChromeOS in terms of the software you can use on it, but for most users that probably isn't even important.
I think there's a reason Apple has the largest cash reserves and of any company and the highest market cap (not sure if that's the case ATM) but they move less products than companies like Samsung, it's because they have fat profit margins. I'm not saying their products are bad, they're mostly great and some of their products are genuinely disruptive. I just think they aren't good value you know. Which is fine, they aren't really meant to be I don't think.