A look at the bounty for native resolution PSP emulation on the PSVita through its built-in PSP hardware - ColdBird says it's possible to do and not just a pipe dream! -
Sony PSP 101 - GameSpot
Change the Rendering Resolution in PPSSPP - VisiHow
Is the display really THAT different between PSP 2000 and 3000? : r/PSP
PSP BEST GAME: High Resolution APK for Android Download
Resolution is a bit low for today's standards but still an awesome feature : r/PSP
PSP E-1000 Review | Eurogamer.net
Sony PSP-3000 Hands-On - GameSpot
4inch IPS Screen Arcade Game High Resolution 800*480 Android Retro Game Console Handheld Game Player for PS1/N64/PSP Two Rockers Consola Retro Game Players - China Handheld Game Player for PS1/N64/PSP and Video
Playstation Portable - Classic Console Upscaler wiki
Generic PSP Handheld Game Machine X6, 8GB, 4.3 inch Screen, Built-in Over 10000 Free Games, Black - Walmart.com
File:Psp-screen.jpg - Wikimedia Commons
A Guide to the Sony PSP (Playstation Portable)
2021 Gamemax 4inch IPS Big Screen Gaming Emulator High Resolution 800*480 Built-in WiFi Android Retro Game Console Handheld Game Player for PS1/N64/ PSP with Two - China Handheld Game Player for PS1/N64/PSP and
PSP: How To Adjust Screen Size On Playstation One Games - YouTube