Through WTO membership, trade will pick up, rising not only because of lower import duties but also because direct investment will rise. This means more trade, leading to more laws and a greater need to adhere to them. Businesses will want to get the goods they paid for. Stronger trade also means greater urbanization. That's why China's eastern provinces are thriving.
Urbanization also means more private home ownership.
Indeed, in the week the U.S. House of Representatives passed permanent trading privileges for China, a far deeper development took place. America and China signed agreements designed to privatize China's housing market and create mortgage-backed securities. From this, one can surmise that concerns about property rights will increase. As Asia's technology invasion of Europe helped develop Europe's legal system, Western technology's invasion of China will do the same for China. WTO membership will help, but the more important influences will come from the resulting internal ones of more urbanization, and thus of more pervasive home ownership.