It's not about the specs, it's about the games. If games are great, then I'll buy it.
The last console I bought because of specs alone was the PS2 and I was very disappointed by that console the first year and an half. Shouldn't have bought that full price at launch.
On the other hand I bought a Dreamcast at launch for the games and it was a great decision (and many dreamcast games were even better looking than PS2 games, so I understood that the PS2 specs were only PR marketing).