I love jersey dresses! They're comfortable like t-shirts but they look nicer and more put-together.
Is comfort a big factor in choosing your clothes? It is for me. I especially can't stand uncomfortable shoes anymore. Luckily, my jobs of work-from-home editor and Mom allow me to dress however I want. But I can imagine putting together some great business casual outfits from knit dresses and tunics, leggings, sweaters, and boots!
That green dress is a few years old, from Boden, here. They still have that style, but in different patterns - and they're on sale! The sweater is from Modcloth, here. They have several colors, in case you're not into grey as much as I am.