yea, they might do a "facelift" and change the interior a bit but i doubt it's going to be that drastic... example:
2003 350z:
2008 350z:
still the same car, just some changes to the overall look. some like the previous version better, some like the newer version better.
side note: it's a damn shame we can't get the reflector-less front bumper like the one pictured above in the "2008" picture for nismos here in the US. it looks sooooo much better and it's not like the reflectors really do much