Got Evergreens to send me some samples.
Looks very realistic, don't think you'd know it was fake unless you were right up close to it. It feels quite soft, not scratchy. Doesn't feel like grass - it feels warm to the touch.
Think I'm going to have my garden completely ripped up and redone. Artificial grass for the most part and probably some kind of gravel / stone chip round the outside with a few low-maintance plants.