Pact of the Blade Count as Magic Weapon?

[megatyler30]

In the description of the Warlock pact weapon, it says "This weapon counts as magical for the purpose
of overcoming resistance and immunity to non-magical attacks and damage."

Does this mean for other things it is not considered a magic weapon? More specifically, I'm wondering if it is treated as a non-magical weapon and thus the Unearthed Arcana Mysic's Psionic Weapon Discipline's effect can be used on it:
"Psychic Focus. While focused on this discipline, you charge one non-magical weapon you carry, or one of your fists, with psionic energy. Attacks you make with it are considered magical and have a +1 bonus to attack rolls and damage rolls."

[SharkForce]

i think that is just to distinguish it from, say, a sword that has continual flame cast on it. the continual flame sword is magical in that it has a magical effect, but not magical for the purposes of harming things with resistance or immunity to non-magical weapons.

or, as another example, a sword created using the creation spell. it is magical. it doesn't get past resistances. but you don't have anything that is not magical, but gets past magic resistance.

[ShneekeyTheLost]

Does the weapon already have a +1 bonus for being magic? If not, you can do it. If it already has a +1 bonus by virtue of being magic, then no, you can't.

It's a legacy from the type stacking rules in 3.5.