Ice Cream Sandwich introduced On Screen Buttons (further addressed as OSB), which effectively stretches the display over the capacitive buttons. The following is an argument on OSBs, and I invite all readers to post their opinions and counterpoints. --- The OSBs introducted in ICS allow manufacturers to incorporate larger screens into devices (4.65" vs 4.3", in the case of Galaxy Nexus vs ReZound). During media playback and "full-screen" apps, the Nexus will utilize all 1280 pixels, but most apps will only use 1196 (1280-84) pixels due to the OSBs. Since the majority of the time the OSBs will be visible, displayed content will effectively be limited to ~4.3" of 1194x720 vs 4.3" of 1280x720 (GN vs RZ). This would commonly give the Nexus an aspect ratio of 1.6611111, a ratio slightly squarer than 800x480 (1.666666). Since 800x480 graphics would upconvert to 1200x720, 4 rows of pixels, from apps developed for the 800x480 resolution, will have nowhere to display. This will require developers to create 1196x720 graphics as well as 1280x720 (since 854x480 upconverted != 1280x720). This could easily be addressed by making the OSBs 80 pixels high, thus upconverted 800x480 would display correctly on the new 1200x720 effective display. While the Galaxy Nexus appears to have enough bezel below the screen to include capacitive buttons, I foresee manufacturers limiting the bezel size smaller than would allow the use of capacitive buttons (at least not in addition to manufacturer and carrier logos). However, hardware buttons, like those on the Droid X, are much smaller than their 84 pixel OSB counterparts, and it could be argued that hardware buttons would allow the greatest screen size and resolution. So then, it seems the argument for OSBs boils down to aesthetics and display utilization. While hardware buttons may allow for the greatest screen resolution and size, many find the design cluttered and may be drawn to the clean appearance of OSBs. So then, the argument for OSBs buttons becomes a comprise of screen size for effective resolution. Physical dimensions constant, a larger screen ratio (screen size per phone size) is always preferable. While both phones approach "retina display", the argument for effective display isn't so much about pixel density (316 vs 342) as it is about displayable content. The OSBs on the Galaxy Nexus allow the user to view 4.65" of 720p media playback, however limit regular applications to ~4.3" of 1196x720 pixels of content. The capacitive buttons on the ReZound limit the user to only 4.3" of 720p media playback, but allow regular applications full use of the 1280x720 pixels. The trade off is a slightly larger screen for consuming media, or slightly more content on the same effective screen size. --- Effective Resolution Ratio Math: Given: GN Screen Size = 4.65" RZ Screen Size = 4.3" Assuming: GN Effective Screen Size (Observed) ~= 4.3" OSB Screen Size = 4.65" - 4.3" = 0.35" Extra Content Size on ReZound: RZecs = OSBss/GNss * RZss = (0.35"/4.65") * 4.3" ~= 0.32" Extra Content --- If anybody has the exact measurements for the GN screen, I can update my math. So how do you feel about OSBs, for them or against them?