[noggin]

Presumably this means that the 140Mbs is a peak not sustained figure then? With all the buffering in the world you won't get a continuous 140Mbs stream over a 96Mbs connection for sustained periods of time (unless you have a very big buffer - which makes it almost like download)

You won't -- but also don't think you'll need it.
CBR content is rare; CBR content > 100Mbps will be even harder to come by..

Yep - whilst I routinely deal with >100Mbs CBR content (SD and HD) daily, it's all 4:2:2 so not feasible for consumer ARM Kodi platforms. (440Mbs isn't unusual for compressed HD content)