Windows XP system requirements:
Processor: 233 MHz
RAM: 64MB
Disk space: 1.5GB
Graphics: Super VGA, 800x600
Windows Vista:
Processor: 800 MHz
RAM: 512MB
Disk space: 15GB
Graphics: 32MB DirectX9 capable
So Win7 still "heavier" than Vista, although not by much. The difference in hardware requirements between XP and Vista is massive by comparison, and one can certainly understand the criticism Vista received for its steep hardware requirements when it was released.
My Netbook will not be capable of running Windows7 - I've only got an 8GB SSD and 512MB RAM. Upgrading to 1.5GB of RAM is easy and cheap, but doing something about the storage is a little more tricky. TinyXP only uses a fraction of the 8GB SSD though and it does everything I need.
there was also almost 8 years of hardware that came out since XP >.> keeping that in mind the reqs for Vista over all arnt that bad
when Vista came out a 1.5Ghz CPU with 1GB ram was avg
also to all you people running with out swap file you really shouldnt >.> windows use it for more then just a place to stuff things when it runs out of ram