Docking Station Question

[nonewsgoodnews]

Ok so I have an Asus laptop. Like this:
http/www.bestbuy.com/site/15-6-touch-screen-laptop-8gb-memory-750gb-hard-drive/2991012.p?id=1219085428591&skuId=2991012&st=%20Q501LA&cp=1&lp=1

I want to get a dock for it so that I can use external monitor, keyboard, mouse, printer, ect. I was looking at this:
http/www.amazon.com/StarTech-com-Universal-Laptop-Docking-Station/dp/B00DNULJHW/ref=sr_1_2?ie=UTF8&qid=1397439072&sr=8-2&keywords=startech+docking+station

Does this provide better performance than just using HDMI output on my laptop? The reason I ask is the bullet that says "dual independent video processing". Does that mean it has some kind of video processor/gpu in it? I'm curious because when I hooked this laptop up to a 1080p monitor it felt sluggish. I have this laptop on a ssd and its lightning quick usually but it felt slow with the hdmi monitor.

Thanks for any suggestions. I"m not looking for gaming performance upgrades, I just don't want it to bog down for office use, video playback, ect.

 

[nonewsgoodnews]

I forgot, I also saw this thing reviewed on twit.tv's "before you buy" here:
https/www.youtube.com/watch?v=649AIBA-t_o

He mentions how good the performance is when using HD video streaming. Is this because he has a crazy fast laptop or because the dock is doing some kind of processing? Thanks.