I doubt we'd see any significant regime change with the path that China is on right now. Generally political systems are fairly stable when either on the more authoritarian or the more democratic side. It's in the middle where instability is most prevalent (called an anocracy). I'd expect that only if China starts to reform its political system to be more democratic that we'd see significant unrest calling for a regime change, and China is currently reluctant to do so.

However, as Youwei notes in "The End of Reform in China" (Foreign Affairs May/June 2015), China is starting to run out of areas it can reform without becoming less authoritarian.

[M]ost easy reforms have already been launched. Revamping agriculture, encouraging entrepreneurship, promoting trade, tweaking social security—all these have created new benefits and beneficiaries while imposing few costs on established interests. What is left are the harder changes, such as removing state monopolies in critical sectors of the economy, privatizing land, giving the National People’s Congress power over fiscal issues, and establishing an independent court system. Moving forward with these could begin to threaten the hold of the Chinese Communist Party on power, something that the regime is unwilling to tolerate.