Let's throw in some guesses:
Arrows: virtually impossible due to patents
GPS lockout: extremely unlikely due to patents
GPS camera database: likely, especially since whistler manufactures GPS devices.
Remote: likely, whistler has had some remote devices too. A 695 remote would be a great addition to their line.
Portable (battery powered): maybe. They would have the best performing portable in the market. With a relatively short battery life
Increased sensitivity: unlikely.
This is the make and break for me as I'm not in the market for a remote. If I were, I'd jump on a 695 remote.
Their platform/performance upgrade cycle has been pretty slow (same or worse for belscort/valentine). Considering the new whistler platform (pro78/xtr690) has been around for a short while, and has already been tweaked (rev.c/xtr695), I would not expect an upgrade here. Mike has been with Whistler for many many years, so it's not like he is a new addition to the whistler team.
That said, IF they reach M4 level sensitivity in a windshield mount, (considering their industry leading response times) I would be dumping my x50

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