I don't have a iLiad, those pictures are I collected from a Chinese iLiad forum. I will ask over there for you.
Even I don't have a iLiad, I can tell you what to expect.
If you want to use iLiad to show a full page (that's why people buy a reader anyway..), the math equations might not look neat. Because iLiad is meant to read A5 size books while most math publications uses A4 or Letter size paper(I guess it depends on the publication country), and by simply resize to a A5 size, it's going to look not as nice as on paper. There is no official iLiad emulator, but it's possible to produce the iLiad effect by doing some simple DIY work.
Change your screen resolution to 1024*768. Then rotate you desktop 90 degrees. Different graphic adapter have different ways to do it, google search might help. If you are using a laptop, get a mouse before you do that, some poorly designed computer have touchpad that act strange after the rotation(like Dell Inspiron 1200 I'm using). After that, open the file you want to test in full screen mode.
Because the computer monitor is larger than the iLiad, some trigonometry have to be used. In this senerio, 2 similar tetrahedrons have to be constructed. I believe you know what I'm talking about. But just in case someone else stumble upon this comment, I will describe how to exactly do it.

Point A locates on the eye.
First, find out how far do you usually read, by measuring eye sight to the corner of the book you are reading, AE. iLiad will exist as the plane EDBC. The computer monitor should be located at where FGHI is. Divide your screen's diagonal by 8.1 inches, that would be the ratio between AE and AI, find AI, then you know how to locate the computer monitor. Read from that distance and that is a good emulation of iLiad. Eyes does not function exactly as I'm illustrated here, if you are near sighted, use your glasses.

From what I read, letter size pages might pose some difficulty, because have to zoom in each time. But people have created latex scripts that split one page into two for this reason, it might be helpful.

BTW the diagram is created by the asymptote code below:

pair A,B,C,D,E,F,G,H,I;
A=(0,0); C=(4,-3); B=(3,-4); D=(4,3); E=(3,4);
F=(6,-8); G=(8,-6); H=(8,6); I=(6,8);
label("Eye",A,S);dot(A);
label("B",B,S);dot(B);
label("C",C,S);dot(C);
label("D",D,N);dot(D);
label("E",E,N);dot(E);
label("F",F,S);dot(F);
label("G",G,S);dot(G);
label("H",H,N);dot(H);
label("I",I,N);dot(I);
 
draw(A--G); draw(A--F);
draw(A--I); draw(A--H);
draw(E--D); draw(B--E);
draw(B--C); draw(C--D);
draw(F--G); draw(H--G);
draw(H--I); draw(I--F);

But please, judge yourself, here are some pictures. Thx to lufee from iPOP, the company selling iLiad in China. The original post is in Chinese, here is the English version with my comment in [].
I asked for images of showing page two of a nice inequality paper as a standard math paper anyone would read, page six of Harmonic division for rendering complex geometric shapes, page 1 of Lifting the Exponent for it's superscripts.
Here they are in order, click to see the enlarged image:

Nice Inequality:
Initial view: [looks a bit small, considering the camera are really close to the paper]

Zoom in view: [This looks really good, most math papers have a huge margin around the page, cutting them off produces a lot better result]

Zoom in view, Landscape:[It can be inferred that landscape view without zoom should be the best for math publications]

Zoom in view, Landscape:

Harmonic Division:
Initial view:[I can't believe I can actually see the difference between those very close circles in the initial view]

Zoom in view:

Zoom in view, bottom page:

Zoom in view, Landscape, Top:

Zoom in view, Landscape, Bottom:

Lifting the Exponent
Initial view:[The picture is a bit blurry...]

Zoom in view:

Partial Zoom in:

Partial Zoom in, Landscape:

Partial Zoom in, Landscape, same as above, camera position changes:

If iLiad have programs remove margins or some program auto zoom, then the images show iLiad is possible for math publications. Even if there isn't any, landscape view should be good enough for most works.