Sorry I thought "security" in this context was related to DRM. I do not think anti-cheat as a reason that companies are moving to SaaS is reasonable at all. They are moving to SaaS for a monthly payment model. There are very few games that get anti-cheat even close to right (including SaaS style offerings).
I have personally created SaaS solutions for anti-cheat. It is definitely a driving reason to push towards SaaS; publishers only concern themselves with DRM to _delay_ the release on piracy sites, but do concern themselves with DRM to _frustrate_ ongoing efforts.
Obfuscated and protected binaries are moving targets. Targets that can be overcome, absolutely; but they remain in motion so long as they are rebuilt.
