May I put in my two cents' worth?
I love The Silmarillion like the Bible, sorry, no offense, and like the Bible it's quite impossible to transfer to film. MAYBE a big-budget series with many seasons... otherwise how would all these thirty or fifty or whatever number you care to name, stories ever be told?
The deep and true problem, however, is that our beloved stories tend to get mangled in the process. I won't deny the wonderful work put forth by Peter Jackson's actors, that have given faces and tones of voice to our heroes (and otherwise), in general pretty good, but I still am not over the surgery practiced on The Lord of the Rings... Glorfindel, for instance, and the twins Elladan and Elrohir, Tom Bombadil, and countless other so-called minor characters. And entire chapters! I was so befuddled by the hobbits jumping on the ferry and then turning up at the gates of Bree. The Old Forest! Tom and Goldberry! The BARROW-DOWNS, for goodness' sake!
I understand dramatic economy, but let's get real: movies come and go, Tolkien is one and alone.
The fact that Silmarillion is clearly divided into chapters makes for wide storytelling, so we would be talking about Beren and Luthien, easily, to say nothing of Turin Turambar that exists in a developed version in The Children of Hurin. Now, regarding the immense backdrop of the entire creation of Arda, I defy any one film to encompass this great mythology. Without impoverishing, hardly likely.
I do love the Jackson trilogy, I won't deny it, but whenever I catch some part on tv, say, I usually end up going back to the book and indulging myself to my heart's content. And I will go see The Hobbit, most certainly, but chances are I will fuss and fume at the deviations from canon.