As June is E3 time instead of looking at the games which came out in 2003, we're looking at E3 that year instead.
Yep, the PSP was shown at E3 2003, which would be Sony's first go at a handheld console outside the PocketStation, the PSP went on to sell over 80m units.
Also from Sony was Gran Turismo 4, the first sequels of Jak & Daxter and Ratchet & Clank as the big hitters plus EyeToy.
MS at the Xbox stage had Halo 2 and what would become Fable, which I remember Molyneux going on about trees.
Nintendo was focusing on the GBA as the SP was shown with Advance Wars 2, WarioWare, Boktai: The Sun is in Your Hand, and Metroid: Zero Mission. But GameCube also got Mario Kart Double Dash.
Elsewhere DOOM 3, Half-Life 2, Metal Gear Solid 3: Snake Eater, Resident Evil 4 were shown it what now looks like a bit of a banger of an E3 but I guess we were a few years into the generation that big titles were coming.
And two games called Call of Duty and World of Warcraft never heard of them. One more thing it just wasn't Sony having a go at the handheld market as Nokia showed: