>The cellular data network will still be important, but in some areas of the world, WiFi saturation may make it less necessary.
Good luck with this. The wireless companies engage in an illegal practice known as "tying" - You buy whatever THEY deem as a "smart" device and you are REQUIRED to buy a data plan. Even if you purchase the device outright, you have to pay hundreds of dollars a year more for data service you may not want or need.
Here's my analogy: You buy a nice new 55" 1080p LED-LCD 3D TV. You've never seen a need for cable before, but your mother-in-law has moved into your spare bedroom and she likes to watch cable. You call the cable company for basic cable. Their first question is "What kind of television do you have?". Strange question, but you answer. Cable- "OK, Sir. You have a screen over 40", so you have to get a HD box. Since it's also a 3D TV, you have to get all the movie channels and sports packages." You-"But I just want basic for my M-I-L to watch the news and normal programming". Cable "Sorry, Sir - that's our policy".
I'm around WIFI all day. I don't have any use for data while I make my commute. I would love to have a new Android gadget phone. Can't get one on Verizon (or any others) without paying $360/yr for data that I WILL NOT HAVE ANY USE FOR. Sure, I could probably find something I'd use it for, but I get along great without it. It's Tying, and it is ILLEGAL. Unfortunately, no one with the deep pockets to fight it cares, they just pay the $360/yr.