https://ansari.xprize.org/ https://auto.xprize.org/
Ocean tech: incremental improvements to devices that were already in production https://oceanhealth.xprize.org/ https://oilcleanup.xprize.org/
Medical gadgets that I'm not qualified to comment on, but look pretty meh: https://tricorder.xprize.org/ https://sensing.xprize.org/
Genomics: canceled because "outpaced by innovation" https://genomics.xprize.org/