With Digital Distribution so matured at this point, do you consider digital only games to be of equal value to those that get a retail release in a console's library?
I'm not sure I'd agree that it's quite so matured. It is on PC but it certainly isn't on consoles. Which leads me to take a bit of a nuanced stance.
On PC, I'd say it's "equal" value to physical since physical doesn't really exist anymore. Also because on PC, unless a game is forcibly removed from a system (which is extremely rare), it stays with me forever AND I rarely have to mess with concepts like license verification beyond simply logging into the various distribution systems. Likewise, as a result of years of digital distribution on PC and increased competition, there are always sales/deals to be found.
On console, it still feels like digital distribution is in its infancy. Prices almost never come down. As an example, Sony is just now catching up to Steam of 5 years ago by adding occasional PSN Flash Sales, but as soon as they're over prices end up going right back up to full retail, even for a years old title. The license system on console is a pain in the ass, especially if you have a console that breaks and you need to revoke the licenses from one system and move them to another. Consoles are also a walled garden so there's little to no competition - yes, you can buy codes from other retailers like Amazon but they're generally pushed into charging the same MSRP as the walled garden store version - and a game bought digitally on, say, a PS3 is stuck on PS3 as the world moves on to the PS4.
I can't embrace a digital-only future for consoles, not with the way things currently are. Plus we already have too few consumer rights as it is, full-digital erodes them further.