There are composite to HDMI and SCART to HDMI "scandoublers". I wish Amigakit.com would carry them as a cheap solution vs. internal scandoublers (even S-video solution would be nice to see, they are like $10 and works quite good).
Quality of Amiga RGB output is really, really nice and for games or some WB work would be sufficient. Not everybody need $140 dollars scandoubler (it is GREAT peace of hardware and quality is outstanding, no discussion here), especially new users.