- 1. Supply chain / component R&D -
You will be very, very hard pressed to source a pre-existing, high quality, non-exclusive 5.4" display with a hole punch. If you end up doing this as your own startup then you're going to start by trying to buy off the shelf parts to keep costs down. But that display you want is simply not on any of the development roadmaps for the major component manufacturers. The industry has its own momentum, and the component suppliers have also been looking at the trendlines so they are building bigger and bigger.
If you can't find the screen you want in a catalogue then you have to pay someone to build it. Convincing BOE et. al that your phone will sell enough to pay off R&D costs is unlikely, so be prepared to pay several million bucks in NRE to make it worth their time (it might still not be) and the wait a year for them to spin up the fabs. So ~$5M and 9-18 months later you have a display.
- 2. Big players are uninterested, not uninformed -
Big companies are drowning in market data. They know some people really, really want small phones. But it's a long-tail opportunity they're willfully ignoring, and people who need phones will still buy something even if reluctantly. I've been in the meetings, small phone advocacy goes nowhere.
Also I'm a little surprised you're hoping an online petition will work after your prior experience trying to influence your acquirers. I presume you saw the inside of Fitbit / Google and how decisions are made...
but... aren't they influencing the trendlines by doing this? if the only things manufacturers make are bigger and bigger, they then get to use the sale of those bigger items as justification to continue to make bigger items?
Also seems a bit weird with more eco-awareness going on that some manufacturers wouldn't explore/embrace 'smaller' in some sense. At scale, it would mean less materials, less shipping, less warehouse space, etc. Apple made a huge stink about getting rid of a wall plug in their packaging, and... over hundreds of millions of units, that little bit doesn't hurt.
Wouldn't more 5" screens (vs 6"+) require less power, less weight/shipping, and less input materials?
The consumer hardware duopoly of Apple and Samsung are the only ones who seem to actually drive manufacturing trends. There are also tons of devices being made for the Chinese market, but you can't buy those because they're usually locked up in supplier agreements and honestly they don't meet "flagship" specs for display quality.
Component suppliers, true we-make-parts manufacturers, are not really trying to influence the big picture so much as make sure they are running their manufacturing lines at capacity. And if they are building panels on spec for open market sales, they are going to build >6" displays because it's a higher probability they'll actually sell at volume.