The major camera manufacturers are all present there - Canon, Nikon, Fuji, even Pentax and Leica.
Of particular note is Nikon's booth - if you are lucky, can get to try out the Nikkor 600 f/4 AFS-II lens and keep an eagle eye out for the two gorgeous Nikon babes. All Nikon products can be seen there from the F55 to the F5, D100 to D1x, lots of sexy AFS lenses, and of course, the 2500, 4500, 5000, 5700 and their accessories.
Canon's booth has an impressive display of prints from their new S9000, but seems to be promoting printers more than anything else. Can also take a pic with the model, but IMHO, The Twin Nikon Knockouts are prettier.
Rest of Comex a bit like pasar malam with vendors selling accessories like Super Magic Tough Stain Remover, Ultra Powerful CD/DVD Scratch Remover; Wonderful Wireless Remote Peeping Cameras; and tonnes of CD-Rs, motherboards, etc. etc. etc.