Art work (paintings at least) are lootable from containers. You can craft some potted plants, just not very many. The thing I find glaringly missing from any source is the plant pot with soil, to which you add a plant. You can only make a pot, not a planter.

I absolutely agree with all of these points and would like to add my two cents to the discussion. Yes, we need a lot more craftable wall decor!

There are not very many lootable paintings, and the best ones (the triptychs) are so rare that most players will never find one. I loot and steal in Vvardenfell and Summerset daily and have for two years. Haven't found one yet. I have multiple copies of most of the common paintings. The same ones in all of my houses look tedious and boring. The ability to frame a screen shot is a fantastic suggestion!

I can make a high elf and a dark elf seal, both of which are metal and look very cool. But again, how many of these two things do I want to display? Furniture plans to make race-based wall hangings (other than tapestries) are hard to find, except argonian ones that I don't care for. There are also a couple of nice mantle decorations and stone wall hangings at achievement furnishers. I would rather be able to craft those things though.

I know ZOS has their hands full trying to add new things for chapters and DLCs, but I really wish they would give this area some attention.