The "H" logo is still used today (though modified and rotated 90°) for Hilton Worldwide and Hilton's HHONORS Program.
On August 16, 2010, Hilton Hotels & Resorts introduced a refreshed identity. This included adding the word "Hotels & Resorts" to the logo, to separate it from the Hilton Worldwide brand. They also altered the blue color and introduced an altered font.
Luxury: Conrad Hotels & Resorts | Waldorf Astoria Hotels and Resorts