The GeForce RTX 3090 is not a Ti card. Ti cards are usually based on a different architecture. And it’s too slow to be a Titan. It’s simply a card for those who want to shell $1500.
The modern gaming hardware market looking like it’s all about 4K gaming at 60+ FPS. Nvidia has already released its 30-series of GPUs that gives a truly massive performance, but chances are, AMD is going to trump or at least compete really well with its “Big Navi” – prices for which are currently unavailable.