Arg, I can't stop myself...

It could be argued that Samus' armor is semi-magical in nature because of the creatures that built it. The Chozo were the most highly advanced species in the universe, and that includes both magical and technological aspects. They were famous for having learned how to impeccably meld together super-advanced technologies and super-intricate magic. The Power Armor that Samus wears was considered to be their greatest single achievement by many.

The theory is supported by the fact that she has an unlimited supply of power for the suit, never needing to recharge and never needing to re-supply her arm cannon's beam weapons. She also has the ability to recharge her shields, missile ammo and Power Bomb count by absorbing the life-energy left behind by fallen enemies, which could only really be magical in function.

Either way, if you asked me, I'd say her armor is half-magic, half-tech.