I wonder exactly what sort of software enhancement they are installing to mitigate a problem that interferes with systems at a hardware level. The solution in the United case appears to have been rebooting the affected systems. So it appears that there was no (evident) permanent hardware damage. But since susceptibility to electrical transients usually involves stopping a system from running it's software, the only fix I can see them implementing is a better watchdog system. Essentially, a routine that once stopped (by a software crash, for example) forces a restart or reboot by a hardware timer. The displays will still go down. But barring any hardware damage by the lightning, they will come back up.
This is just my guess. But if anyone close to the systems knows, It would be interesting to hear.