in 5 years tablets should be very worried as laptops by then will be closer to desktops. Who on earth would pay a lot of money for a tablet when its inferior to a decent laptop now anyway!
I think you are underestimating the importance of non-technical facets to some people. Laptops are already, and have always been superior to tablets in terms of processing power, but that hasn't prevented people buying tablets.
Here are some reasons why tablets are popular, and these are reasons that will still be relevant no matter how 'close to desktops' laptops become:
-Greater portability, you can put a tablet in a handbag, small ruckset pocket etc. Mobiles fit in your pocket.
-Much better battery life
-Less overhead if you just want to quickly check something - swipe to unlock and you have your answer in a matter of seconds, no waiting for a laptop to boot / resume
The fact is, tablets and desktops address different markets. I have a desktop PC, a laptop, a tablet, a smart phone and three game consoles.
Desktop: Proper gaming, Office, general internet usage
Laptop: Don't use this much to be fair, take it away sometimes, mostly it is used by my wife for studying. If it wasn't for her I probably wouldn't have one.
Tablet: For surfing on the sofa, checking emails / social networking, take it away on holiday usually (GPS/maps etc very useful)
Smartphone: Highly portable device that lets me do basic internet stuff like email, looking up train times etc from anywhere with a mobile signal. As good as a tablet if it weren't for the lousy screen size.
Consoles: For playing console-exclusive titles like Gran Turismo 5 and 'party gaming' like Guitar Hero, Wii Sports etc
To be honest, pretty much the only reason I still have a desktop PC is for gaming, a laptop hooked up to a Monitor, mouse and keyboard is just as good for everything else (that's what I use at work). But in the future, say 15 years time, who know what the PC gaming market will look like.