They're shite and no better than what we have. At a tiny fraction of the cost we could clear the junkies and drunks out it and it'd be fine. Waste of fucking money.
I'd choose the first one if I thought for a second it might actually look like that. The paths will be grey after a very short while (if they're even white in the first place) and as someone else said they're going to need railings. Which aren't pictured. So to me it doesn't seem like that (or any other of the designs for all I know) are being portrayed accurately.