This is also possible for XP users. ;)
among other options....
not to mention that running in low power mode (AKA, only-used-when-used mode) shortens your hardware lifespan.
computer hardware is meant to run online as much as possible (what might be the case of web or FTP servers), not to be brought back and forth from offline to online.
laptops might be meant to resist that on/off switching more than desktop PCs, but it affects the hardware the same, if not more, since laptop components are more fine-tuned than PCs when it comes to power, and thus are more delicate.
but ...well... who does really use Vista actively anyways?