Nvidia isn't selling one-off home computers afaik. But yes in terms of datacenter cloud usage Nvidia performs.

GB300 DGX Station was announced last Monday.

It's going to cost far more than a diy machine with multiple lower end GPUs. Which is fine -- it's aimed at enterprise, not home labs.

https://marketplace.nvidia.com/en-us/enterprise/personal-ai-...

Amusingly there's a macbook next to it in the pic, is this headless?

It has a HDMI port and its USB-C ports also support display out. But I believe most who buy it intend to use it headless. The machine runs Ubuntu 24.04 and has a slightly customised Gnome (green accents and an nvidia logo in GDM) as its desktop.