Well given that they're all lossless formats, the image should appear identical with any of the codecs, with only the file size (and encoding style) being different.
More practically, since browsers won't have an flif decoder there isn't an easy way to embed the images online without reencoding them in a different format, which would rather defeat the purpose of putting up sample images.
They could demonstrate interlacing comparisons by slowing down (through setTimeout()) the image processing in the browser.
Having a Youtube video already shows that it works really amazingly well (especially coming from Adam7), but seeing it interactively on a selection of images would be nice.
After all, the single biggest feature is that you can actually stop downloading the image whenever you feel like you don't want to spend more bandwidth!
Oh! Derp! I guess I am used to marketing-level abuses of language.
>More practically, since browsers won't have an flif decoder there isn't an easy way to embed the images online without reencoding them in a different format, which would rather defeat the purpose of putting up sample images.
BTW, credit to the flif people for linking competitor formats bpg and webP