The strongest GPS signals come from directly overhead, but most of the time you can see between 7 to 10 satellites spread over the sky. The LEO satellites arc across the sky in passes ranging from a few minutes to several hours, we have 6 dishes at work tracking them so it makes a great visual aid to locating them . The more satellites you can see, the greater the accuracy of your position, but 3 gets you pretty close, and even if you turned your camera upside down and lost all signals, the GPS unit remembers its last known location.
Right. I keep forgetting it's purely time-based and not vector-based, so there's no real precision loss even if all three birds are in the same general direction (so long as they aren't collinear).
Either way, the point remains that I would not expect an antenna under the display bezel (front face) to be significantly worse than an antenna on top, as that's the most common antenna orientation for devices like phones while you're using them.
I can think of no technical reason why Canon could not mount its GPS and Wi-Fi antennas inside the display bezel like Apple does with the Wi-Fi antennas on the MacBook Pro. It's not like the screen will ever be made of metal. And if they find that the signal isn't good enough for some reason, there are lots of interesting tricks they could do to get around it, like adding a couple of tiny bands of metal somewhere on the front, separated by rubber seals from the rest of the body.
Do you mean the display bezel at the back or the LCD one on top?
The one at the back has a user-replaceable plastic cover to protect it, so it may be that putting an antenna there will disrupt that design.
The one on the back. There's usually not a way to attach an antenna usefully to a bezel itself. Instead, they're typically screwed to part of the frame that supports the display panel, which in turn holds them right behind the bezel. I wouldn't expect bezel antennas to interfere with the removable cover (or at least not any more than having a fragile display panel behind a removable cover).