Oriya appears to be quite complicated to render: http://www.microsoft.com/typography/OpenTypeDev/oriya/intro....
Meanwhile, I wonder if this means we'll see OCR and ePubs for all kinds of scripts now; or if this will help enable Google Translate in more languages? ;-)
Devanagri is what Hindi, Marathi, and Sanskrit use, so I am certain that it isn't any more complex to render than those languages.
I wouldn't be surprised if there happens to be an Osmanya geek in Google, but none of his teammates has ever heard of Oriya. For the same reason, I wouldn't surprised if they added a bunch of geeky fictional languages before actual ones.
http://www.unicode.org/charts/PDF/U10480.pdf
already contains reference glyphs. If you want to preserve scripts, preserve Unicode tables instead of making fonts.
On the other hand, Oriya, which has over 33 million native speakers, including 80% of India's Odisha state, does not appear to be supported.