The idea is interesting. what would you checksum? the whole address or just parts?
how many emojis will that be?
Even if they are definitively more memorable than hashes, and you can leverage the "castle in the mind" technique by stringing those visual representation into a mnemonic story, it's still a lot of symbols to remember
and it won't help much some dyslexics who often confuse the order of thigs
the second inconvenience is that stylisticly, do you see plausible that slick looking dapps will suddenly put down a long line of emojis ?
I think it would be fun , but I'm not sure how many companies will buy into the idea...
We need to find the right place where to put these
where do you think is appropriate to put them in a dapp?