7D2 is likely to have the new sensor.
70D... maybe someone can stress that a 70D released before the new 7D2 could initially affect 7D1 sales, but if Canon sticks to the same 18Mpx sensor for 70D, considering that it will be on sale until (my 2 cents) 2015... I just can't imagine that a 2009 sensor can survive for such a long time in the Digital Age.
imagine it, especially given how long Canon have kept the sensor alive up to now. We've actually been in a "digital age" since the 1960's, or before...what things are digital, and what are not, is what changes...along with the nature and quality of digital.
It is still funny to me, to hear downloaded music described as "digital"...as if its the first digital music. CD's were the first consumer-oriented digital music...and their format is still higher resolution than MP3, because MP3 is "lossy", by design. (There are other compression formats that aren't lossy, but nobody seems to care about those.) MP3 was a compromise designed to save memory space. It's certainly not more advanced than "CD quality" music...and there are other formats superior to CD.
So that leaves us with what's really always the determining factor: What will the market demand, and what are they willing to pay for it? "The Digital Age" is a meaningless descriptor now. Someday in the future, our kids or grandkids will laugh at us when they see pictures or video of us walking around oblvious to our surroundings, as we obsess over texting or browsing on our smartphones. The present "digital age" will just be thought of as "quaint" in the future...of course...assuming there isn't a collapse of civilization...which can't be ruled out.