Since you say "at the moment", I hope that this will change.
I mostly wanted to be able to write a review, and maybe to have a way to avoid using the launcher, and start the game directly through Steam.
Avoiding the launcher seems very unlikely, but I see this whole thing as a very positive change.
If the launcher remains, then steam keys shouldn't be problematic. It would be no different than signing into the store to download the launcher. Anyone could give the launcher away, but it wouldn't do any good as they still need a valid game account. At first I imagined that was their pause; making sure it didn't act as a "I have one key from the store, so I gave away my steam key" catalyst, but the way the launcher works that should be utterly pointless. Maybe. I'm not sure how purchasing Elite from within steam works.
Why it matters to me:
Steam keeps track of my games for me. I tend to lose them otherwise. It's one of the first things I reinstall on a new system, and due to the various humble bundles and steam sales I have hundreds of games (some I've never played) and what I will play is chosen from that list almost exclusively. Elite and Dwarf Fortress are the only non-steam games I routinely play. I've bought and lost Another World, Mount and Blade, some RPG I don't recall and a bunch of others, everything tied to an email address that was lost to me and I'll never get those back. I switched to steam a few years ago and I've been wary of buying anything outside of the platform since then. Honestly, Elite may be the only one I've purchased without a steam key in years. Right now Elite is very fresh for me and I spend a lot of time playing it, but in 5 years seeing it in that list is what will draw me back in to get my ships out of mothball and find out what I've been missing. I don't mean that as some slight against Elite, that it won't hold my attention or anything back-handed... That's just how I am and I'm not likely to change at this point. I'm a cheap







and while I'll buy it again on PS4 (still waiting on the announcement guys), I won't buy it again on steam.