So I finally took Adam Koralk's advice and bought the Toro VGA box for Dreamcast today. It should hopefully be coming soon.
I was then going to buy the VGA to HDMI box he recommended in the following video.
https://www.youtube.com/watch?v=JXvXE-Nqr54
Unforunately, it is discontinued now.
Does anyone have any recommendations for a different one to get that isn't shit quality?
Any help would be great as I really want to play some HD Shenmue soon (assuming the domain registration thing doesn't pan out... )