DLSS 3 Frame Generation- major selling point, or worthless marketing gimmick?

What is DLSS 3 frame generation? Can it really double framerates? What are the downsides? In this video I go in depth on my hands-on experience using DLSS 3 Frame Generation and way in on whether it is an amazing new selling point, or a worthless marketing gimmick. All footage was captured on an RTX 4090 unless stated otherwise.
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