Haven't run into any teardowns yet. First batches shipped this week, so I guess we'll see a teardown from someone next week, hopefully.
Oh yeah, I don't care much for the new flat flex cable either.
Of course when you're plugging it in or disconnecting it, hold it from it's connector instead of the cable. Duh.

I'll make a guess that if it does break and you're out of warranty, replacing it will be difficult and it's a whole another question if there will even be replacement cables available from anywhere.. Worst case scenario it's soldered straight to PCB..
But I think, whatever the case, if you're out of warranty then tough luck. At least it's relatively cheap.
When I get mine I'll use velcro to secure it behind my TV. Solves the dangling freely issue and I'll also use a separate (short) HDMI extension so I can keep it's own cable straight.