It isn't needed to unlock any further skills currently, but it'll naturally climb from 40 to 50 as you continue to craft and deconstruct things so there's really no reason to worry about it.
I think most people are assuming they will add an additional tier or two of base crafting materials with expansion content (and additional Veteran Ranks) in the future.
“Attention Zenimax: Stamina builds don't hold up to magicka builds, and this is causing most of your class imbalance. It makes melee weapons and bows weaker than staves and class abilities. It makes medium and heavy armor less desirable than light armor. Fix this imbalance, and you'll address most of your balance issues.”