Common & almost accurate notion:
There r three types of people in this world.
One type uses desktops.
Another uses lappies.
Laptops for the richer mobile dude... who doesn't want performance & continuous/long-time usage.
Desktops for the performance-oriented super-user on constrained budget.
Lappies can't run safe for more than 4-5 hrs continuous. Also they r low on performance.
Desktops r high on performance, can b run throughout for days and cost cheaper for the same specs... about 40-80% cheaper!!!
So... final tally... If u move from place to place regularly and can compromise on performance, u can opt for a lappy; but if u stay @ a place for quite long & can't compromise on performance, desktops the way to go.
Of course, forgot of the third type... my type... those who can't compromise on performance, but need mobility.
They use Desktop-Replacments... *img116.exs.cx/img116/6469/g5cgrin.gif