I'm on 45Mbps/11Mbps in a suburban area in the UK. We might get 1Gbps next year. A cable provider (Trooli) previously installed down our road in 2023 and left out two houses. The one I own is one of them.
At this point the main thing that would change is I'd be able to do online backups for TB of data. With 1Tb/s internet I would save a lot less on my hard drive and download ML models and more whenever I needed them. But I just know the remote server I'm downloading from would still throttle me to Mbps to guard their bandwidth.