That´s what usually happens when you get a console at launch.I remember how quickly I got bored with the PS2 playing only Tekken Tag and Ridge Racer, in November 2000.
Things started improving a little in March 2001, with the release of Onimusha.
There a couple of exceptions..for example, I had the N64 at launch and only Mario 64, but it was so groundbreaking, so unreal at the time, I couldn´t get bored with the system even with only one game.
The Dreamcast is another example.Power Stone, Sonic Adventure and Soul Calibur kept me entertained for a long time.
But most launches are 'meh' as far as I´m concerned.