I find stories about recycled plastic based building materials encouraging. It's ironic that plastics, which can take decades or centuries to decompose, have been so heavily used in the products with transient lives, but wood which decomposes much more readily is the primary component of homes, which we at least hope will last much much longer. The plastic bag for example, which on average is probably used about 30 minutes a piece. Even computers and electronics, which at best will last ten years, usually less, before being obsolete.
There were many other factors which have lead to the current state, of plastics being part of the most disposable products, but I think a number of them are changing and I won't be at all surprised to find that some of the intrinsic characteristics of plastics, rather than the incidental characteristics of early plastics, will play a greater role in their future.