A user interface enhancement system for a touch interface device, comprising: - a sheet having: a layer portion defining a surface and a particular region; and a substrate comprising a face coupled to the layer portion at an attachment point opposite the surface, cooperating with the layer portion to define a fluid vessel formed from a combination of a cavity and a channel, the substrate portion adapted to define a fluid outlet that allows fluid to flow between the channel 138 and the cavity 125 to deform and un-deform a particular region of the surface 113, wherein the portion of the substrate portion that includes the fluid outlets is adapted to provide a support for the layer portion at the particular region to substantially prevent the layer portion from substantially depressing into the channel 138 when force is applied over the particular region, and wherein, in the retracted volume setting, the support is adapted to inhibit deformation of the surface in the direction of the substrate - an attachment component configured to semi-permanently, or transiently, mount the sheet over a display of the touch interface device; - a volume of fluid arranged within the fluid channel and cooperating with the layer portion and the substrate to transmit an image output from the display through the substrate; and - a displacement device coupled to the fluid channel and configured to displace fluid into the cavity to transition the particular region of the surface from the retracted volume setting into an expanded volume setting. - a sheet having: a layer portion defining a surface and a particular region; and a substrate comprising a face coupled to the layer portion at an attachment point opposite the surface, cooperating with the layer portion to define a fluid vessel formed from a combination of a cavity and a channel, the substrate portion adapted to define a fluid outlet that allows fluid to flow between the channel 138 and the cavity 125 to deform and un-deform a particular region of the surface 113, wherein the portion of the substrate portion that includes the fluid outlets is adapted to provide a support for the layer portion at the particular region to substantially prevent the layer portion from substantially depressing into the channel 138 when force is applied over the particular region, and wherein, in the retracted volume setting, the support is adapted to inhibit deformation of the surface in the direction of the substrate a layer portion defining a surface and a particular region; and a substrate comprising a face coupled to the layer portion at an attachment point opposite the surface, cooperating with the layer portion to define a fluid vessel formed from a combination of a cavity and a channel, the substrate portion adapted to define a fluid outlet that allows fluid to flow between the channel 138 and the cavity 125 to deform and un-deform a particular region of the surface 113, wherein the portion of the substrate portion that includes the fluid outlets is adapted to provide a support for the layer portion at the particular region to substantially prevent the layer portion from substantially depressing into the channel 138 when force is applied over the particular region, and wherein, in the retracted volume setting, the support is adapted to inhibit deformation of the surface in the direction of the substrate - an attachment component configured to semi-permanently, or transiently, mount the sheet over a display of the touch interface device; - a volume of fluid arranged within the fluid channel and cooperating with the layer portion and the substrate to transmit an image output from the display through the substrate; and - a displacement device coupled to the fluid channel and configured to displace fluid into the cavity to transition the particular region of the surface from the retracted volume setting into an expanded volume setting.