"For the foreseeable future you can still access updates." This is what I often worry about most; at some you'll be left with what comes on your physical copies. It's just now occurring to me the importance of backing up as many games as possible onto external storage because at some point, there will be no access to important patches directly through the consoles. Especially with today's broken game releases, you never know what trouble you'd face not being able to connect with a modern console.
I'm sure there will be a few Wii U physical games to go up in price, as a result. Even if it's just artificially induced hysteria, it's probably boiling over as we speak. Digital games, I've just never been interested. Anyhow once they go offline, I'd consider them fair game for piracy if need be.