Because it can be used as a document scanner. Ever deposit a check by taking a picture of it? Ever store a receipt by taking a picture of it? You can do that with larger documents and see them well on an ipad.
Maybe you already know this, but you can scan documents on your phone by using Notes.app
Open Notes, click the little camera icon, and the menu will give you a "Scan" option.
I mention this because it has many advantages over taking a photo as a scan:
(1) the scanner app will automatically align and crop the document you are scanning, so you don't need to be able to see a big version. You just point the camera sort of in the direction of the document and give it a few seconds; it will do the rest.
(2) it takes the scan automatically as soon as it locks onto the image, you don't even have to press a button. Even better, you can put a second page down (or turn the document) and it will take a second scan, then a third, fourth, whatever, to create a multipage PDF. The only button you have to press is after all your pages are done, when you say "Save".
(3) This is all hooked into what is called Continuity Camera which means you can do it from your Mac. Open a Note on your Mac and you can, likewise, click the appropriate icon to get your phone into scanner mode, and the scan will dump into the Note on your Mac. In THEORY you can also do it from Mail, but in Mojave that doesn't seem to actually work :-( Maybe it works in Catalina, but I haven't tried yet.
It's supposed to work in a few other apps as well, but Mail is the one I care about (wish it worked!) and Notes (use it all the time).
Use your iPhone or iPad to scan documents or take a picture of something nearby and have it appear instantly on your Mac.
support.apple.com
BTW if you do this in Notes, it is supposed to OCR the scan and if you search (iPhone or Mac) the relevant note should come up if it includes what you're looking for. This appears to work (has always worked for me), but Apple doesn't (yet?) give you full access to the OCR'd text, only indirect access by search. Maybe they don't yet trust the quality of the OCR, so they don't want people being disappointed by a high error rate (one error every sentence or so?).
If you care about OCR, IMHO BY FAR the best solution today (though it's a little it of a hassle) is to drop the PDF scan in a Google Drive, then open your Google Drive web page and ask to export the PDF as some sort of text document. This is a hassle as a frequent work flow, but works so well if you have infrequent OCR needs, especially if the source material is pretty low quality.
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I've never really understaood "FaceTiming" either. The only thing that changed my view A LITTLE BIT was the birth of my daughter for my parents. They live 3 1/2 hours away, so it was a way for them to see her more often. I absolutely loathe using it for myself. LOL
You need to think laterally. Eg it can be useful at the supermarket, where you can show someone "Are these the veggies you want? How about those ones?" Same thing when buying clothes, furniture, so many things when someone else's opinion might matter.
Think of it as image teleportation, not JUST as a way to see other people's faces.
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I know, it is my wishful thinking. 😔
The iPad is so behind, last week I had a meeting from the field, I had to share my screen as were the other Engineers and it was impossible, the were using Surface tablets, and I literally had to take a screenshot of everything I wanted to show and share it that way.
I could not work on the data I was collecting, I had to wait every night until I got to the hotel, exhausted, to work on it on a proper computer... But hey, at least today we can connect an external drive and access files, before that was also impossible.
Not sure EXACTLY what you mean by "share screen", but if this is a common problem"
- one solution is to have a large screen with an aTV connected to it. Everyone can view the large screen. An app like Air Parrot allows Surface to broadcast to an aTV, so everyone gets their turn to present to the group.
- there are also cross platform screen sharing solutions (like WebEx Teams) that will allow you to share the iPad screen to Surface (and various other devices) and vice versa.
My guess is the aTV solution is probably better, everyone looking up at a single large screen, but point is multiple types of solutions do exist.