I would also like to post this link again as a comparison, please note that your traditional 16:9 is slightly larger vertically and the 21:9 monitor is slightly larger horizontally while losing the extra vertical space. So all and all both monitors have an advantage just one vertically and one horizontally, I hope Blizzard will re consider their stance as I feel neither monitor has a real gaming advantage over another.
you do realize, that a 16:9 monitor with a resolution of 1920x1080 does not have an advantage in vertical view compared to a 21:9 monitor with a resolution of 2560x1080 pixels?
with 21:9 you just see more left and right. for top and bottom it stays the same area u can see.
your site just compares the actual display sizes and doesnt factor in resolution.
please stop spreading misinformation.
apart from that i also see no reason for not supporting this resolution in a game like d3. where as for starcraft 2 i could accept their argument.