Hey Raj .. It does not (and cannot) replace my laptop completely ... at-least for me .. as Im a techie person and my work needs windows .. For others it might replace .. If you are looking for a laptop replacing Tablet .. I highly recommend ASUS Transformer .. but Galaxy Tab is very handy for me .. as I move/travel a lot .. so fetching and replying mails .. SMSs .. social networking .. voip calling .. Skype .. maps etc becomes pretty handy ..
I also own a Galaxy S2 phone ... and most or all of these things are possible on it too .. but Im someone who prefers a bit bigger screen for all this .. also it saves the battery of my primary phone .. The battery life Tab is excellent .. once fully charged .. I dont need to recharge it for abt 4-5 days .. and I'm a moderate user ..
I also own a Galaxy S2 phone ... and most or all of these things are possible on it too .. but Im someone who prefers a bit bigger screen for all this .. also it saves the battery of my primary phone .. The battery life Tab is excellent .. once fully charged .. I dont need to recharge it for abt 4-5 days .. and I'm a moderate user ..