The political ecology of Taiwan when 228 incident occurred is largely different than the current (smoggy and turbid) one in Mainland China. And in the late 1980s, KMT regime lost its vitality(, but still holds some kinda moral integrity, )as the older generation who fled from the Mainland to Taiwan around late 1940s died out or retired, allowing a transformation of the political session there. However, in Mainland China, the power of the ruling party still tightly grasp the controls and the grassroots are more suppressed and less clearly divided than those in Taiwan at the time.

I'm not trying to generalize that a revolution would not happen here in China but changes in near future is highly unlikely, except that the economy of China would collapse or the ruling party itself would be split by inner struggles.