Meta Platforms Inc.’s new Ray-Ban Display glasses don’t do enough. But that’s not really a complaint — it’s a reflection of their potential. The concept is so compelling that you’ll wish they could do more, right now.At $799, these are Meta’s first glasses with a built-in display. They deliver the same smart-glasses features we’ve seen before: the ability to snap photos and videos, summon an AI assistant with your voice, and act as wireless earbuds for calls and music. But the screen changes eve...