While SD cards are being more the norm for PROSUMER cameras, this is an ignorant comment. CF cards ARE faster. This isn't really something to debate. When you shoot in high bursts as a professional photographer would, a CF card is faster. You don't have time to wait for cards to buffer/write to SD cards. My Micro 4/3 cameras all work with SD cards, which is much more convenient. The latest Pro cameras by Canon & Nikon have both SD & CF cards though. I still only have the 7D Mark I so it's CF cards in that.
Yes, SD cards are becoming more widely adopted but they are a far cry from what a CF card can do.
But to that end, if you are at the point where you are using a high end pro camera that uses CF cards, why wouldn't you have your laptop with you anyway? For that kind of work load, there's no tablet - access to file system or not - that is going to be more beneficial than bringing a laptop to manage that workflow. You should be dumping cards onto drives every night and backing those up to a 2nd drive.