Nope, won't help. Secure boot can be spoofed. A simple github search will show that clearly. It also won't stop DMA hacks that don't need secure boot because the hacks are located on a second pc. Also hack developers can just simply spoof a certificate similar to most high-end malware.
This is all just smoke and mirrors "buy our game, there will be less hackers". There will be a slight decrease, but nothing big.
What it might do is lower the player base and cause game Launching issues. Not everyone is tech savvy, they are adding an unneeded barrier to entry. I suspect this will backfire.
