There are only two ways for Taiwan to go:
First, Taiwan unites with the mainland. If so, Taiwan will be enjoying the good or the bad as all the mainland people do. Viewing from the international trend, China will get better and better as time goes on.
Second, Taiwan keeps to be isolating with mainland. If so, Cuba would be the example. We know how miserable Cuba is. For decades, Cuba's economic is chuckled by the US. Its people's living standard are all in a low level condition.
Taiwan could become a Cuba, believe me, if Taiwan doesn't wake up from dreaming.
As to so-called "Independence", it is only a dream for those independent activists!, it is impossible!