Has recently been changed to ‘Clarity’, which sounds more self-explanatory. Also got a shiny new upscale/sharpening method that replaced the prior sharpening filter.
Upscaling/sharpening can only do so much though. Nothing replaces real resolution, so for a really crisp image you have to run games at higher resolutions than the usual default res. For older games even 2400p might be possible with a decent GPU, for newer, more demanding games you have to find a compromise between resolution and performance that fits your PC.
BTW: Make sure to check the ‘Custom Resolutions’ section in the vorpX help. Has a step-by-step guide that explains how to add resolutions your PC cannot display normally.