Will you be able to buy glasses at Casaba?

What's going to be available in the first drop of Casaba is still being determined. It's part of what the PTU process is.

But if the stuff I see going through Shotgun every day is accurate, it's a whole lot of pants.

Yeah, there's so many pants. No cargo pants. Apparently there are no cargo pants 900 years in the future. So we'll have to wait and see exactly what's in the first drop of Casaba. And of course, things will be added to Casaba with successive patches. Even if what you're looking for isn't in the first drop, it'll probably come.