Long-term performance question

Two questions,

1) I really need a new macbook; I want to get the macbook air. Is there any advantage of getting it now versus waiting until january 2014? Will there be any refresh then even if very small? (I know of course currently it suffers from WiFi problems..I'd wait for that to be fixed first). Please let me know your recommendations.

2) For basic tasks like Word Processing, Web Browsing, HD Movie Watching and ONLINE HD Movie streaming, running multiple applications - will the current macbook HASWELL air i7 8 GB edition be able to achieve the above mentioned feats in a smooth fashion for the next say 6 to 7 years?

Thank you

 

Cool thanks Saberon, I said 7 years because the white macbook i am using right now is 7 years old; and well; other than the case having the edges come off due to tear and wear as well as defect issues and the laptop getting too hot the performance is still surprisingly well...in fact if i had no other choice but to stick by the laptop its very usable but the hotness causes battery to expand and causes trackpad problems..

Anyways, ya that's why i said 7 years because thats the longest I've had a macbook that worked well;

Also waiting until janaury 2014 there won't be any interesting changes to the air right?

And this is the macbook I have from 7 years ago:

Introduced May 2006
Discontinued November 2006
Model Identifier MacBook1,1
Model Number A1181
Order Number MA254LL/A (White), MA255LL/A (White), MA472LL/A (Black)
Initial Price $1,099 (White) $1,299 (White) $1,499 (Black)
Support Status Supported
Case White (1.83 or 2.0 GHz) or Black (2.0 GHz), durable polycarbonate
Weight and Dimensions 5.2 lbs., 1.08" H x 12.78" W x 8.92" D

 

Thanks you.