Earlier quoted context omitted.
Counterpoint: is the web browser not already fulfilling the "universal app engine" need? It can already run on most end user devices where people do most other things. IoT/Edge devices don't count here, but this day most of their data is just being sent back to a server which is accessible via some web interface. Ignoring the fragmentation of course; although that seems to be getting less and less each year (so long…
Yes. But it consumes at least 10x-100x more resources to run a web app than to run a comparable desktop app (written in a sufficiently low level language). The impact on people's time, money and on the environment are proportional.
Does it? Have you compared a web app written in a sufficiently low level language with a desktop app?