multitask

I wish to buy a new gaming laptop and was wondering whether the slew of laptops with 8GB of RAM ever going to use the entire 8GB ever, if yes under what kind of application load? Finally considering that I will either play a game or multitask with anywhere between 5-10 Chrome tabs, Word and...

1) What is your budget? (INR or USD) around 20K inr 2) What size & weight consideration (if any) would you prefer? Netbook; 11" - 10” screen or less Thin and Light; 12" - 14" screen Mainstream; 15" - 16" screen Desktop Replacement; 17"+ screen preferable 15 - 16 else...