I think you all need to chill out. RAM on a SOC is very different to that used currently on MBP's. Take the iPad Pro, it only has 6GB, and no one would complain it can't multitask or edit video at 4K and above, it's super good. This technology will need many of you to take some time to understand, it's different. The old norms, and spec's are not relevant anymore.
Part of the memory consumption is due to the management by the OS and the way the hardware works, but another part of the memory consumption is due to sheer needs of the applications that are running. So, yes, some things will change. I do hope the "unified memory" thing to save a bit compared to the integrated GPU. Also, the ARM architecture and future versions of Mac OS may handle memory recycling better. But when the applications that you are running need more RAM, you need more RAM.
For dev purposes, I often need to run a couple of Linux VMs and give 4 Gb each.
I also use photo RAW files processing softwares that seem to make use of quite a bit of RAM. I stopped doing panoramas, but the stitching software I used needed a lot of memory too.
I would even argue that, if you need a lot of tabs open, web browsers like to eat a lot of memory.
These are just examples, but I am currently using a Mac Mini self upgraded to 32 Gb and that configuration is much more comfortable than my MBP with 16 Gb. I do expect ARM to possibly shrink the gap, but not to make 16 Gb all of a sudden ok.
In the current line up, I think the Air is ok; the current configurations are consistent with the old ones. But the situation of the MBP 13" and Mac Mini are somewhat strange; we should probably wait and see how the next batch of higher end M1 copes.