The most important on-line purchase to actually see off-line is indeed a monitor (to a lesser degree mouse/keyboard). If the demands you have of viewing angles and colours are met or not can't be told from most reviews or facts.
The biggest problem from evaluating viewing angle stuff with review can be that you possibly cannot get a proper idea of the extent of the issue with a few pictures. You'd need dozens of picture, and you'd also need to compare it side to side to another monitor. On a mall, they're physically side by side, and both monitors are in the same lighting environment and you are viewing with your own eyes (i.e using same optics, unlike different review sites having different cameras and different environmental lighting). Plus monitors are a light source instead of just reflective to light. No camera is even intended for capturing a light source. Biggest problems were of course related to CRTs flickering while filmed with a video camera, but I could still see potential issues from trying to take even still images out of a non-flickering TFT.
Yeah. Anyway, monitors HAVE to be viewed in-situ (or window-shopped before buying online).
One thing that totally pisses me of is TFT specs and to even further laptop's integrated TFT specs. Where's all the information that actually matters?
Panel type: TN, IPS, AFFS, MVA, PVA, ASV and their variants S-IPS, S-PVA, P-MVA, A-MVA, S-MVA (yeah, more than 90% of panels are TN but occasionally you may run into S-IPS). Whether you're buying a separate monitor or a laptop with a monitor, you need to really dig into stuff over the net to find this information. Not only is it not listed in simple specs at the mall or at online retailer, the manufacturers site probably won't tell it either. You need to find some hardware hacker site to find out about these "hardcore stuff".
Resolution: While I could barely understand that panel type isn't specifically advertized (though I don't understand why it's hidden completely), the fact that they don't mention TFT native resolution is totally enraging. If online shop has a laptop listed, it will probably only tell the diameter of laptop's screen, nothing else about the screen itself. Same applies to mall specimens but at least in the mall, you can guesstimate the approximate resolution of the screen by looking at it. There's only a small variety of common resolutions so it's not that difficult. Even if you couldn't tell the resolution, you can at least put them in some order from best to worst. Desktop monitors usually have their resolutions published by both mall retailers and internet retailers. However when shopping online, they are usually categorized in the product list by diameter with the title not containing any mention of resolution... thus you have to open detailed specs of every f'ing monitor available through them! I can pretty accurately state the size of monitor I need, with only few inches per category, but I cannot state that I need at least 1080p (either 1920x1080 (FullHD) or 1920x1200 (WUXGA)).
Surface finish of the panel: You know... does it reflect stuff annoyingly. Ironically, sometimes they even advertize the glossy surface as superior. Having bought a laptop
in are when ALL laptops came with glossy panel, I'd really want to take a sandpaper and scrub the panel to make it matte... but I don't since it'd break in the process. But I really would like to. Heck. I'd like to take pound of dynamita and blow up the whole f'ing laptop only because the f'ing monitor just pisses me off! Who is the fucktard who invented glossy TFT? Or in fact, the glossy surface it the natural form of TFT. It's just that since the beginning of TFTs, they've more or less understood why they should use a matting layer on top of it. Suddenly, someone came up with an idea that it never was needed in the first place, as if everyone manufacturing TFT so was were mistaken. And as a
backlash result, everyone started making glossy ones. And
not now it has lashed back to the other end again with glossy finishes disappearing again. And they don't bother to inform customers about glossing at all. Luckily, at the mall, you can see it with your own eyes. They can't bullshit with you on resolution, surface coating, luminance and chroma shifting on viewing angle (and uniformity of the shift as well).