Now that the demo appears to be coming to Steam, I am Reckoning it won't.

It's a long-shot. EA's not quite fond of Valve recently and ME3 is already an Origin exclusive. I have a feeling by all means it will. But if a demo really is coming to Steam you may have a point. Or it's just a leverage.
On another note the Skyrim comparisons should stop. In hindsight Reckoning seems to be even less of an RPG, not to mention I thought Skyrim was a step up for BGS. For what it represents in TES lore Skyrim was done well.
Reckoning leaves me wanting more though but with Ken Rolsten on board, who dumbed down Morrowind from DF's level, it's not quite a title that I see to be an RPG stand-out but a nice playthrough. Its mechanics are the same/less than Skyrim. So far the story/writing might be what to look towards.
Hate to say it but even a bare-RPG like ME3 has me looking more forward to it, or Rockstar's games.