It should be possible to install haiku on any BIOS or EFI based x86 tablet PC including Microsoft Surface, Fujitsu Arrows Tab, Lenovo ThinkPad Tablet. On some tablets touchscreen and pen is not working because it use i2c HID that is not implemented yet, but Korli work on it, see Using new driver API - #21 by X512.
Haiku use desktop-oriented interface, but it is possible to add multi-touch support and touchscreen gestures like scrolling and menus views with scrollbars and zooming with 2 fingers.