The picture below shows some of the key architectural features from the Edwardian period. Although less detailed than Victorian rooms, Edwardian design still often featured a picture rail (the mouldings which run above the doors and windows), a dado or wainscot (moulding which rungs just below the hip level) and of course, cornices and skirting boards.
Image from Paint & Paper by David Oliver
Colours schemes of this era were also fresher; pastel tones and pearly greys were used extensively.
Here are some pictures of modern interpretations of the Edwardian style.