Kinda hard to have hope after the 5D3 sensor,does rather make it sound like there IS a problem with the 5D3 sensor ie a fact
If instead you had said something along the lines of
"The 5DIII sensor appears to have fallen behind the D800 sensor" then that would have been a valid opinion
Nothing "appears to be" ... there is plenty of visual evidence available showing that there IS a problem with the 5D3 sensor:
* it HAS seriously less DR than the D800's sensor in DR from ISO 100 all the way up to ISO3200.
* it HAS seriously less resolution than the D800 at all ISO settings.
* it IS only a minor update on the 3+ year old 5D2 sensor.
Facts, not fiction, whether Canon fanboys like it or not.
It is not a fact yet, but well founded speculation, that the upcoming Canon mirrorless will be nothing more than a G1X with a lens mount. Like the G1X it will likely deliver better IQ than P&S but I do not expect it to beat the best mFT mirrorless entires ... eg. Oly OM-D. Performance, AF, responsiveness and UI will "consumer-crappy" - as on the G1X.