I'm not sure why we're worried about "billy the farmer with 2.5 kids" in a world that is continually becoming more dependent on a stable online connection. These straw man arguments are only put in place by people who refuse to accept progress due to their outdated reasoning.
Broadband infrastructure is growing by leaps and bounds and I'm sure you've seen the discussions of internet service being classified as a utility.
Let's be clear, when we talk about a "digital only" age we are referring to two separate things: We have streaming, and we have downloads.
Gaming is clearly not ready for streaming however, we are certainly ready technology wise for a digital download only market. (I'm not particularly happy about this either but I'm not oblivious to the facts. See this thread:
What does subscription based content mean for the future of entertainment?)
To address your hypothetical about "billy the farmer" and his slow internet:
"Three aspects of your internet connection will affect your online gaming experience the most:
upload speed, download speed, and
ping rate. Each gaming system has its own requirements for these capabilities, but if you have a download speed of at least 3 Mbps, an upload speed of at least 1 Mbps, and a ping rate under 150 ms, you should be covered for most online games.Keep in mind that these numbers are for a single player only. For multiple players using the same internet connection simultaneously, multiply the requirement by the number of players using the internet connection in your home. For example, if you have three players in your home, you’ll likely need internet with a download speed of at least 9 Mbps.
How Much Speed You Need for Online Gaming | HighSpeedInternet.com"
"Below are the internet download speed recommendations per stream for playing TV shows and movies through Netflix.
0.5 Megabits per second - Required broadband connection speed
1.5 Megabits per second - Recommended broadband connection speed
3.0 Megabits per second - Recommended for SD quality
5.0 Megabits per second - Recommended for HD quality
25 Megabits per second - Recommended for Ultra HD quality
Internet Connection Speed Recommendations"
There is no reason a person with piss poor internet speeds cannot enjoy digital games. Even if the download takes 30 hours, the system can download the game in the background, and even when it is in sleep mode. You can also "pre-download" the game if you pre-order, giving you days, if not weeks, to download the game and have it ready for release.
Another big issue that people skip over is this: How does "billy the farmer" have a playstation and is able to download patches several gigabytes in size to play his physical copy but does not have the ability to download a game? This "billy the farmer" argument is what killed the XB1 this gen, and complacent, stubborn consumers, did nothing but halt progress.