If you want, I can:

Cemu remains the gold standard for Wii U emulation on PC in 2026, offering performance and visual fidelity that significantly surpass the original hardware. Users generally report that for major titles like The Legend of Zelda: Breath of the Wild, Cemu is the superior way to play due to extensive mod support and high-performance capabilities.  Performance and Graphics 

Resolution and Framerate: Unlike the native Wii U, Cemu allows games to run at 4K resolution and framerates exceeding 60 or even 120 FPS with the help of community mods like "FPS++".

Visual Enhancements: Through Graphic Packs, users can add ray tracing shaders, increase draw distances, and apply anisotropic filtering, features entirely absent on the original console.

Loading and Stability: Modern updates have introduced the Vulkan API, which makes shader compilation much faster and reduces the "stuttering" commonly seen in earlier versions of the emulator.  User Experience and Setup  Wii U games on Android Setup Guide using CEMU!

Cemu recently went open source (August 2022), leading to:

With open source, we may see:

A ROM (Read-Only Memory) is a digital copy of a game cartridge or disc. For the Wii U, which used proprietary 25GB optical discs, ROMs are usually distributed as:

CEMU ROMs are digital copies of Wii U games that can be read and executed by the CEMU emulator. These files are essentially dumps of the game data from the Wii U's cartridge or digital library, captured and saved in a format that CEMU can interpret. For a game to run on CEMU, a user needs both the emulator itself and a compatible ROM of the game they wish to play.