Unfortunately the "trendiness" of the full face masks make them a "must have" for those newbies wanting selfies and GoPro type cameras which rarely work properly with these new masks. The people that buy them usually have little if any previous experience snorkeling. 
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Nothing beats the less expensive classic old school oval mask which provides a great undersea reef view and reminds you constantly that you are swimming in a sometimes dangerous ocean requiring a sense of where you are AT ALL TIMES with your fresh air supply.
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These new more expensive masks invite lots of potentially deadly mistakes as people lose track of the fact that they aren't in a Disney movie with colorful tropical fish with no natural limits. These new masks sure look like they encourage a mental grey out that leads to drowning. 
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This needs further investigation. I think most people who have actually spent some time reef snorkeling would see these new masks as expensive and dangerous for newbie tourists.