Earlier quoted context omitted.
my understanding is that much of the motivation for PoS is to avoid the electricity usage, and in some but not other ways of measuring it possibly has some better security properties, not really increasing the throughput or gas fees?
PoS is more scalable because if you need faster validation all you do is add more parallel nodes. With PoW all the validators are competing against each other to be the fastest whereas with PoS there is no competition but consensus. Eth2.0 is supposed to be much faster than Eth1.0 anyway, they say it'll be capable of doing thousands of transactions per second (as opposed to the ~15 it is doing right now). It's partly…
By parallel validators, do you mean more validators for each block of the... beacon chain(?) or, do you mean like as validators on different shards?
As you can see I haven’t been keeping up with the details