What's new from a developer perspective; different than a system/admin or user perspective though https://dev.windows.com/en-us/...
Except reading the patch note, while Windows Vista, Windows 7, Windows 8 and Windows 8.1, Windows RT and Windows RT 8.1 are listed its to say they are not affected.
So its a patch for the server products.
No this is a completely different situation. Microsoft is not being asked for their own company's data; they are being asked for someone else's data, which is hosted by a foreign company on foreign soil (though MS USA is the owner of MS Ireland). Also as they are asking for emails, they are not asking for the container, but for them to search and disseminate the contents of said container.
This would be more like a US court asking as US owner of a building in a foreign country which was rented by a foreign bank, to go in and open one of the bank's safe deposit boxes and search through it, find some items and ship them back to the US without the bank or the owner of the deposit box's permission.
I like the part where they are magically going to make OCR work via the camera on a cellphone.
Windows Phone already does that though, you hit the search button, choose eye, point it at something, choose scan text, it highlights all the text at which point you can either choose copy, search, or translate. If you translate it will overlay the translated text on the image in your chosen language.
If you had better tools, you could more effectively demonstrate your total incompetence.