It's definitely an interesting subject, and it might be fine as an introduction, but it is glaringly obvious to me that the author's understanding of rendering is only skin deep, and he gets the deeper technical wrong.
22:58
Anyone who knows how GPUs and raytracing work understands that the new RT cores are only doing a part of the rendering. GPUs are in fact a collection on various specific accelerated hardware (geometry processing, tessellation, TMUs, ROPs, video encoding/decoding, etc.) and clusters of ALU/FPUs for generic math. Even in a fully raytraced scene, 98% of this hardware will still be used. The RT cores are just another type specialized accelerators for one specific task. And it's not like everything can/will be raytraced; like UI elements in a game, a page in your web browser or your Windows desktop, it's rasterized because it's efficient, and that will not change.