You can easily buy an Anbernic device for less than one hundred dollars if you just want portable emulation, so it's not the form factor. It's specifically for people who are hung up on software emulation vs. FPGA-based emulation.
Seems to be $120 for equivalent form-factor, but still missing a large amount of what the Pocket supports (such as physical cartridges, link cable, and TV output), and with a worse display and a smaller battery. And it's not like the Pocket is that much more expensive at $220.
Irrelevant. Your claim was specifically that the only reason to get a Pocket was for people "hung up on software vs. FPGA emulation". I pointed out multiple unique features of the Pocket and differentiating aspects vs. a random Linux emulator handheld.
The FPGAs are neat, and certainly help with power efficiency here, but they're not the primary draw of this system. It's the fact that 100 pixels make each gameboy pixel and serious work was done to use those 100 pixels to look like a convincing recreation of the original screen. That's easily $100 unique.