That's just the short term problem while 802.11 chips are the cheap device preferred by hardware manufacturers. This will get a lot harder to block when the LTE/WiMAX/HSPA/etc chips become cheaper and the device manufacturers start negotiating deals with the network owners for cheap low-priority batch-job rates. Your TV can store what you've been watching as long as necessary, and upload whenever the cellular network is quiet. Precedent for embedding a cellular radio already exists with "onstar".
I seriously doubt anybody checks that their electronic devices aren't uploading personal data at 3:27AM once or twice a week.
Just look at the current TV market for how pervasive these things can get.
once there, we are doom