I don't believe you mean technical improvement, but you probably imagine that some kind of massive pump would happen then. I believe the exact opposite would happen, as most media would focus on the alleged 1+ million BTC mined by Satoshi and the possibility of him dumping them on the market. If Satoshi is alive, he knows very well that it is best to remain anonymous not only for the reason already stated, but also for his own safety.

According to the above, I do not find any good reason why Satoshi should return.