1. Personal preference. I like to have my television surrounded by systems, it makes it much more gamey.
2. Personal problem. I have seven systems connected to my television without using a switchbox.
3. People are lazy. Personally I hate convenience, it just makes everyone lazy and impatient. If humans were truly intelligent beings, they'd invent machines which do things less effectively.
You are most certainly the exception and far from the rule, meaning I would be hesitant to use your situation as a basis for arguing in favor of everything having to be on retail.
Furthermore, I'm most certain that you're going to see more and more companies move to the downloadable model.
Why is Sony experimenting with Patapon 2 as a download ticket? Because this means the game cannot be sold back to Gamestop and resold as a used game 15 more times.
Look at it this way: Nintendo hates piracy and will go through great lengths to shut it down, even so far as to find the base of operations of a piracy outfit.
They hate piracy because it cuts into sales. However, piracy is just a whisper on the SCREAM that is Gamestop. How many billions of dollars in sales has Gamestop cost game publishers?
Considering that the entire business model of Gamestop revolves around selling used games instead of new games, I think it's safe to say that every game publisher in the world would be happy as all hell to see Gamestop out of the picture.
And it's only getting worse, since TRU and other retailers have recently announced that they too will be reselling used games.
The push to digitial distribution is going to come harder and harder as more retailers cut into the profits of publishers, just as many musicians were happy to put their MP3s up on iTunes instead of letting the record companies take 98% of the profit on every CD sale.
And FYI, iTunes is the 2nd largest retailer of music in the US, just behind Wal-Mart (who they're still gaining on).
With publishers having EVERY incentive to move to DD, I think it'd be foolish to expect the future to go anywhere but there. It'll take some time, but I see it as inevitable.
The music industry already did it and plenty of game dev houses make their living publisher-free via DD and have never seen a reason to go to retail. Why would they start now?