NVIDIA recently unveiled its 2021-2025 roadmap for the datacenter segment. The roadmap indicates that an Ampere successor, likely Lovelace, could arrive next year, with a new GPU architecture beyond that set to arrive before 2024.
https://www.notebookcheck.net/NVIDIA-s-new-datacenter-roadmap-indicates-that-MCM-based-Lovelace-could-arrive-next-year-with-a-successor-before-2024.537375.0.html
Isn't Lovelace rumoured to be a monolithic GPU, at least for gaming GPUs? (https://twitter.com/kopite7kimi/status/1337618376634421250)
What"s the rush? Gamers can barely get an Ampere because of chip shortage/miners/scalpers...
And the chip shortage could last through 2022.
Yes, MCM allows you to make processors so big that they wouldn't be viable as a single piece, increasing transistor count. But ultimately, you're limited by efficiency. Performance gain not offset by efficiency gain means an increase in power consumption. That can work out in a datacentre setting. It's a harder sell to consumers. Imagine trying to sell a 1 kW gaming card. On the other hand, a 5 kW GPU server will find a market.