@rohit, if you dont mind paying lots of money for windows OS then paying for applications like Office, then paying extra money for higher end PC system because windows is MUCH slower, then sure, windows is great.
on the other hand, if you want Free software (Free price and also Free meaning Freedom) which works well/faster even on lower end hardware costing you less in software prices and hardware costs too, then why not? You get the OS and also apps like OpenOffice, GIMP (Photoshop free version) you name it, you have it...
main perceived disadvantage of Linux is you need to be tech savvy to use it (like you have been asking so many questions) while Windows "just works" but I challenge you to be able to use Windows error-free and hassle-free for much longer without the need to post technical questions asking for help from others even though you have paid for the software
BTW I recently got Acer laptopn with Win7 and also installed Linux and it is clear to see that Win7 is much slower/sluggish compared to Linux...
Plus WIn7 came with lots of crapware/bloatware like Norton security, McAfee Antivirus, Office trial versions all scamming you and asking for more money and slowing down the system.
Ubuntu installation on that same system works super fast/smooth and I have all the apps worknig without a hitch.