In this extended abstract, we discuss high-level design principles and future applications that can be enabled by RF-IDraw, an RF-based trajectory tracing system originally proposed in . RF-IDraw achieves trajectory tracing accuracy of a few centimeters and hence, enables novel applications in gaming, gesture based interfaces, indoor navigation and the like, using RF-signals which could not be possible with existing RF positioning systems. The accurate trajectory tracing is the result of an interesting antenna array design principle, wherein we exploit the tradeoff between ambiguity and resolution in the antenna array formulation to improve the resolution of the RF-positioning systems. The current implementation of RF-IDraw runs using commercial, off-the-shelf RFID readers and enables a realtime virtual touch screen which can be used for applications like in-the-air gesture recognition and word recognition. This application can be used in variety of ways to interact with any computing device, including, but not limited to, sensors, smartphones, laptops and projector-screens.