I hope to soon have the Fujinon TSX1440. I am fairly convinced (thus far, owning a Canon 12x32 with its inferior stabilization and presumably inferior optics) of the potential. The Canon is ultimately superior to any non-IS bin I own in terms of detail it can reveal. Even the NL 10x42 cannot compete. However it's not as pleasant to use (ergonomics are middle of the road except for the eye cups which are terrible, and the CA and general view is quite good but nothing that really wows). I think the Fujinon will be the best expedition / pelagic binocular possible (except for tiny boats that rock wildly).
In terms of a dream binocular? Basically anything in the 8-12x range, with competitive alpha level optics (65-ish deg AFOV, fairly flat field, excellent CA control / contrast, etc), Fujinon quality IS or better, a reasonable form factor (electronics have come a long way since the 10x42L), good eye cups, weather sealed, and a replaceable battery that can be charged in-unit via USB-C. None of this seems a stretch of the imagination. The optical parameters are available in many alpha level bins. The electronics get smaller and lighter in every generation of Canon/Sony/Nikon lenses. Cel phones are waterproof and yet not terribly difficult to charge.
I do think at some point an IS bin like this will finally come along and it will be something of a game changer. No one is using non-IS telephoto lenses any more, so it surprises me a bit that there has been so little advancement in IS bins. Of course many will prefer a simpler/lighter/non-electronic device, this being an argument that doesn't apply to cameras which are already electronic so adding IS to the lens isn't adding electronics. However if you could have the equivalent of an SF or NL that weighed perhaps 300g more, had a bulkier mid body, but had 5 degree IS... oooh la la.