[doublepost=1521948429][/doublepost]There is most CERTAINLY a BIG reason to upgrade, the support of 10 bit H265 HEVC video codec. While it’s primary need was to shrink the file sizes (and thus the bitrates) of 4K video files (H264 4K is nearly 120GB per movie vs H265 is 60% smaller & preserves same quality) this also applies to 1080p or 720p saved in 10bit H265 HEVC (also sometimes listed as “Main 10” in some specs). The A8 chip does NOT have ability to hardware decode (a thus play) H265 material. The A9 chip and above have the ability and even more, the A10 and above have the ability to store pictures in the HEIF format which is ALSO half the size of a full res jpeg. The A10X chip is a BEAST and is in the iPad Pro for a reason. It even benches more than the A11 chip in some tests b/c of the “X” giving it a 3rd GPU Core. The A8 chip is rumored to have H265 decoding ability according to the HEVC website, but my guess is Apple, in an effort to avoid paying patent rights on every A8 containing device, decided to deny developers access to what was likely only a H265 hardware decoder and still on the edge of being powerful enough to not even encode H265 and thus, justify the expense of paying the patent. The A8 has multicore scores around 2400 vs. A11 getting near 10000. On the Antutu bench the A10X saw 220,000 while the A11 saw just over 202,000. By contrast the A8 was closer to 48,000 I think. Full 75% less performance in some tests.