I remember wiring up cat5 gigabit about 20 years ago in an industrial workplace. My house of that age also has cat5 everywhere and it’s aged very well. 1gig is still the standard for wired with few but expensive 2.5g and very expensive 10g home and small business options.
Even now 1gbps is plenty for virtually every end user and I suspect it will be good enough for a long time (maybe VR changes things??).
Stable Diffusion XL is only about 8 gigabytes and can render a shocking array of different images from very short prompts with very high fidelity.
1gbps might be enough for more than we think.