SN65DSI84: resolution check

Hi Team,

Quick question from customer, from first page datasheet, it mentioned supporting below resolution, given higher resolution seems enough, so doesn't quite understand why specify a lower resolution can be support as well, customer wonders if it imply any special setting/condition to achieve highest resolution? Thx!

60-fps WUXGA 1920 × 1200 resolution at 18-bpp and 24-bpp color,

60 fps 1366 × 768 at 18 bpp and 24 bpp

Andrew