They've compacted channel pages to the left side of the page, and with how they seem to want to get rid of the tabs, they might just do an entire overhaul of the youtube layout soon or at least channel pages, more so then they have done recently. With how a week ago I didn't have a channels tab, which is back, and with how they seem to be testing out getting rid of the about tab, who knows, maybe they might get rid of tabs entirely, or they might keep the tabs but get rid of the special pages for them and just have it redirect to the section on the channels home page.