They did show a few games that they said would be 2x to 4x faster thou, so i guess depends on the games.
only if using DLSS 3. if the game doesn't support it then the 4080 models are hardly faster than the 3090ti. You need to go to a 4090 for a 60% performance gain. Hence the old stock of 3080/3090/ti is still worth good money performance wise.