Smoke, thanks for the update, much appreciated. Like a few others on this forum, I have my 740 panel mounted and use it to drive my autopilot. To the best of my knowledge, tablets do not have the native capabilitiy to stream NMEA data out of a serial port.
It's unfortunate that iFly is not planning to continue with a line of hardened, dedicated, sunlight readable, gps moving map device. As noted, like many others, I use my panel mounted 740, to maintain situational awareness of weather, traffic, and to drive my autopilot. It does this very, very well and is 1/3 of the price of the only other dedicated moving map device (Garmin Area 760) that provides similar functionality. The problem with Garmin is that they use proprietary protocols and do not work with non-Garmin products so you can't use iFly or Uavionx products. IMHO the useablity of the Garmin app is horrible and doesn't even come close to the iFly UX.
Being in the tech industry for many years, I am aware of the implications of running end of life software products, particularly at the system level. I don't agree that Windows CE claims aren't relevant to running the iFly app. Non-functional requirements such as reliablity, security, supportability, .... are just as important as functional requirements. Applications are only going to be as strong as their weakest link. Case in point is that the Windows CE OS doesn't gracefully recover from network disconnects as many have found out when trying to connect multiple iFly devices to a Uavionix ADS-B transceiver. With the proliferation of IoT devices, ransomware attacks and hacks are on the rise, hence the need to keep all of your devices patched and updated.
The EFB market is becomming crowded. I think iFly can continue to differentiate themselves from the competition by offering an option to run their iFly app on a dedicated, hardened, sunlight readable Microsoft or Android moving map display.