The Innovators Dilemma is still completely relevant and has substantial predictive power today. I'm seeing it in spades in my current company. The problem is in fact not predictive power but deciding how to avoid being trapped by it--Innovators Dilemma is weak on actionable solutions.

I have not read the follow-in Innovators Solution but doubt it really solves the problem in anything like a general way. The trouble is that new markets are basically very uncertain. Big companies like Disney, Apple, or Boeing that have crossed into new markets executed successfully on bet-the-company products. Not everybody pulls it off.