Have any of you heard anything in the pipeline to make IPP work with LR and tethered shooting?
Can't do this via a USB port in the IPP because there isn't one.
The IPP is an iPad with a supersized screen. No additional ports. (corrected below)
The only way I know of shooting tethered with an IPP is either via a Camranger via Wifi to Lightroom on a laptop
or Capture Pilot on the IPP via Wifi to Capture One on a laptop
Software for the IPP can only be downloaded via the Apple App Store (same for iPad Air and iPhone).
Lightroom Mobile can be used on the IPP (running iOS9) but not the desktop version of Lightroom which requires the desktop OS X operating system.
Yes, fair point.
My understanding is that that is currently a bi-directional charging (and syncing) port for the IPP and Apple Pencil.
Might be an option for tethered shooting down the track? I'll watch this with interest since my dreams for tethered shooting are similar to yours.
You need to look more closely at Lightroom Mobile and its sibling Lightroom Web.
The Lightroom Desktop dialog that starts a tethering session now lets you choose an existing collection. If this collection is one that has been synced with LrM, new photos will then be synced automatically up to Adobe's servers. Someone can then use an iPad to review new pictures (logging into LrMobile using your account) and someone else may simultaneously view the collection in a web browser using Lightroom Web (with or without an Adobe account).
So you need a real computer, and it's not exactly the configuration you described, but I've run a studio session with an iPad locally and another client who was unable to attend in person but could choose images via her browser.