Thanks for bringing this up Mbitr, but I think it is a very bad idea in many ways.
First of all this caught my attention:
Apple and Google have very robust security measures and Photo Seeds indirectly depend on their security procautions.
If I get it right, you then rely on a cloud service provider (which me and most of my colleagues just call "someone else's computer"). You rely on them to not fumble with the images in any way (like others have mentioned for example the image metadata). I can see the faces when Apple announces a new privacy initiative and declares they have scrubbed all images stored with them from location data. Also very exciting would be Google telling you that they invented a new lossless compression algo that saves 20% space on their storage, kind as they are they already processed your images (remember it's lossless, no problem for you - image looks 100% the same

). Also you rely on them to keep your images stored at all, that is you actually store a seed that is probably more than 100MB (from 12 images) on their computer and just pray that they won't inform you that they lost a few megatons of data due to "the human error of an engineer during a storage maintenance". But wait, they don't need to lose all 12 images, having one slightly altered is enough for all of it being worthless.
At this point I am wondering: Why have a seed at all, when you rely on Google to store a complex dataset from which you can produce a seed (as long as not a single bit has changed), why not just keep the moneys on an exchange in the first place?
I'd say that is more secure for the user, if a regulated exchange loses your money, you can sue et al (I am not saying you get it back). If Google loses images that you had stored on their platform (most probably for "free") you might get a discount offered for Google drive, but your data/seed is gone and no chance for legal action as for sure you signed/clicked some agreement saying basically "anything can be lost anytime and it will be just bad luck, no compensation or whatever".
To me this looks a lot like a half-baked solution in search of a problem:
If you have big moneys in your wallet you don't store the seed online (no matter in which form) and even more so not on someone else's computer. If you have not so much moneys in your wallet, what's wrong with writing them 12 words down on a post-it (not everybody needs the fire safety of filippone's
Securing Your Seed Phrase with Washers) and keep it at home so you still have it when you lose your phone?
As welsh said:
The current system we have is perfect, you don't really need to remember your seed..
<snip>
I could not agree more to that
the system we have is perfect, I might add it is also simple and secure.
If one doesn't understand or comprehend "write this 12 words down and store them securely to restore your wallet in case you lose or damage your fondle slab." will (s)he understand why to remember 12 images and pray they don't get lost or altered? I guess not.
IMO the general idea of backing up your valuable data (which a seed seems to be the perfect example of) on a single cloud provider is a very bad concept by itself.