If games get more advanced utilizing new tech AND becomes more fun, providing a more amusing show and entertainment ofc it will devalue older not so fun and amazing games. This is just as normal as nobody finding an electronic tube fat tv great anymore
Sure there may be a nostalgic and collector value in old things, but as a whole it will devalue lesser and older stuff.
If this continous, which is great btw i dont think the cgc model holds up much longer.