At this point, most HDMI splitters (or adapters) can output your PC to multiple screens at up to 4K resolution, so you shouldn’t lose any visual fidelity. That said, most splitters and adapters will cap and reduce your PC’s refresh rate to 30 or 60Hz, which may be well below your PC and monitors’ capabilities. Splitters and adapters may also introduce lag, which would be more noticeable in gaming than in other uses, and you may run into problems with longer lengths of HDMI cables, especially when using a non-powered splitter.