The "new shelf" update includes a picture so we can observe the evolution of old layout to the new one (there was a relocation inbetween).

Also:

Anyway, I figure I now have storage space to spare for many years to come. Technically, there’s room for 1000 DVDs (if you pack ‘em in). Currently, I’m at 500. Given that it took nearly 10 years to reach that point and given that I’m not buying as much as I once did, I don’t think I’ll be running out of space any time soon - if ever. DVDs in standard size keepcases are an endangered species as is.

DTO undermines the economy by putting shelfmakers out of work [1].

[1] I'm joking.