An xbox or Playstation or Harvey Norman PC is fark'n powerful and flash for 90% of the people who buy them.
For a while.
A custom PC lasts a lot longer - but can be upgraded later to still be powerful. (same pc from PS1 days still runs quick. PS1 is now a Lada)
To add longevity (power/flash wise) to any of the above requires community, modability and desire.
No one is going to spend time, nor is the community/desire going to be there to upgrade/hack the xbox, PS or HN PC - will be a new model later to swap over for.
The custom PC will have parts swapped out, have the bios entered and tweaked, be broken, fixed, broken and fixed again.
To me most cars are xboxes, playstations or HN PC's
No matter how great they are at launch - no matter how great the specs are - that's the best they'll ever be.
Some cars though - they get "Jailbreak"'d
They become the custom PC versions - get tweaked, upgraded, overclocked, broke, fixed, broke and fixed again.
Has the Kia got the factory or the community support to be anything other than a console or HN PC?
Will it be the next WRX or EVO or FPV or HSV?
Or will it be the next Hyundai Soupe?