I'm a bit disappointed it's evolution rather than revolution (from both Canon and Nikon) but then again, that in itself is nothing new. Having said that, it looks to be another hugely capable camera.
The flagship camera will only ever appeal to a small niche of pro shooters who either don't own the kit themselves (and rent it/their company has it) or are hugely invested in the lens lineup for the chosen brand. So while it's fun to play with and look at from a neutral perspective, whether the Nikon has better high ISO performance by 1 stop or Canon can shoot 30 mins instead of 3 mins 4k video doesn't really matter. Both cameras are a significant step up for the pros who use them and comparing them is largely pointless. And comparing them to even the top end Sony kit is pointless, different tools for different jobs.
I'd disagree about the card performance though, it's very important. Pros who shoot many frames and download to editors back at base need the vastly increased performance to make deadlines. Shooting video demands these performance levels too while simply shooting stills will still benefit - both while shooting and downloading later. I've compared regular SD cards vs high speed cards and when you are downloading significant quantities of data into Lightroom (or even just backing them up while on a trip) then slow cards make a huge difference. This was especially noticeable when I was downloading tens of thousands of high res images during my Canon 5DSR review period. One question, what size cards are people shooting with?
For irregular or lightweight users shooting relatively infrequently with small sensored cameras then card performance is of lower - but not negligible - consideration. Not everyone may be nudging the limits but the difference is night & day when pulling 64gb off several SD cards. Think HOURS of difference
