The benefit of 4k over 1080p seems obvious on paper � 4k has four times as many pixels as 1080p, which means it should have a clearer picture � but there are a couple of things you should know to make your 4k TV worth the upgrade.

Just in case it matters, I used Perfect Resize (trial version) or rather I showed the client how to resize the photo, since transferring that huge, almost 1GB file, was a challenge.

transfering a 1gb file has to be the easiest thing on the planet, dropbox, wetransfer, dropsend, onedrive, google drive, etc

Yep, done that, obviously. 
Nevertheless, the customer kept on complaining about corrupted files, no matter which service I used (dropbox, wetransfer and google drive)

At the end of the day, it could have been the application he used to open the file.
Even my Adobe Bridge crashed, systematically, when that humongous file was saved in a folder Bridge scanned automatically.

The good news is that I got paid, which means that the customer has been satisfied  by the proposed DIY solution

And btw, Perfect Resize gives better up-sizing results than Photoshop or Blow-Up.