Can you be a Compy dinosaur hopping around cutely with a chainsaw larger than your body? Can you make a simulated sailboat and sail it past people's houses while spurting gore from your bloody stumps? Can you make something spontaneously in-world based off of a whim? No? It's nothing like Second Life then, sorry.
I guess any program which lets you be a 3D person and wander around without any specific gaming function means it's GUNNA KILL
SL TO DEATH OH NOES!!!@!