True, but the upscaling hardware in most monitors and especially TVs sucks and adds extra frame(s) of latency, so ideally you'd upscale the picture on the FPGA

True, but the upscaling hardware in most monitors and especially TVs sucks and adds extra frame(s) of latency, so ideally you'd upscale the picture on the FPGA to the display's native resolution (or at least something common like 1080p) to get the best quality (pixel doubling if possible) and lowest latency (a scanline or two) possible. Something I didn't consider when I posted was that a lot of people will want to use this with a VGA CRT, especially since there is lots of Amiga software (including the Workbench itself) that changes the pixel clock midframe, which would pretty much require upscaling hardware to produce a signal that a modern LCD would accept. VGA+a CRT requirement becomes a much simpler solution in light of this.