That link didn't work for me. But, yes, that is a new Montana! Surprised they don't have a blog entry on their site as usual. Looks very nice - I have been expecting a device like this for awhile, it has the new features of the GPSMap 66 and Overlander and uses their new system.
Montana® 700i is a handheld GPS with on/off-road navigation, two-way text messaging and interactive SOS via inReach®.
buy.garmin.com
I'm not sure if these devices are even compatible with Basecamp or the maps that I make, maps are loaded directly from the device by wifi or a connection to your phone. These new devices use the online system that just went down with the ransomware attack. Has a nicer, larger screen than the old Montana and I don't think you can change the batteries. I suspect it's an Android device.
Will be interested to learn more, might be a nice unit to have. But that price.... $600 for the base model, $700 with satellite communicator and $800 with a camera!