The client requires keyword search around following concepts, for the same I will try and understand their link with P2P Networking
WiFi & P2P
The link between WiFi and P2P I found was Mesh Networking. A mesh network is a type of networking wherein each node in the network may act as an independent router, regardless of whether it is connected to another router or not. It allows for continuous connections and reconfiguration around broken or blocked paths by “hopping” from node to node until the destination is reached.1
MANET (Mobile Adhoc Network) is a mobile mesh network and is a self-configuring network of mobile devices connected by wireless links. The growth of laptops and 802.11/Wi-Fi wireless networking have made MANETs a popular research topic since the mid- to late 1990s.2
Netsukuku is an experimental P2P internet free of central authority as it is free from an ISP & Server.3
Meraki Networks, a 15-employee start-up in Mountain View, Calif., has been field-testing Wi-Fi boxes that offer the prospect of providing an extremely inexpensive solution to the “last 10 yards” problem. It does so with a radical inversion: rather than starting from outside the house and trying to send signals in, Meraki starts from the inside and sends signals out, to the neighbors.4
Similarly other similar forms where in WiFi (IEEE 802.11 standard) and P2P come together are - wireless ad-hoc networks, wireless mess network, etc. There are now even P2P games for Apple products like iPhone which use WiFi as the P2P Infrastructure, some of the games are - Topple 2, AirHockey, etc.. many more available on the AppStore.
Even Google is invested in MANETs & P2P in the form of adhocgrid.
Bluetooth & P2P
Bluetooth and WiFi use the same frequency, only difference is that WiFi does it at higher power hence has a stronger connection. Bluetooth is mainly used for Personal Area Networks, in which it is used for setting up P2P networks.
WWAN & P2P
A WWAN differs from WLAN (wireless LAN) in that it uses mobile telecommunication cellular network technologies such as WIMAX (though it's better applied to WMAN Networks), UMTS, GPRS, CDMA2000, GSM, CDPD, Mobitex, HSDPA or 3G to transfer data. It can also use LMDS and Wi-Fi to connect to the internet. These cellular technologies are offered regionally, nationwide, or even globally and are provided by a wireless service provider, typically on paid basis.5
There is thus scope for P2P networks in WWANs too.
GPS & P2P
Global Positioning Systems might be enabled by Peer to Peer systems, traffic reports using the same can be done too.
Augmented Reality & P2P
Augmented reality games extend reality with virtual elements to enhance game experience and mobile P2P networks provide autonomous, self-organizing, scalable and robust communication platforms.6 Augmented Reality coupled with P2P can thus provide state-of-the-art gaming experiences.
A collection of recent augmented reality and other innovations are laying the groundwork for the scaling of peer-to-peer sharing of physical assets. Sharing challenges such as trust, transaction and search costs, and asset management are actively being addressed.7
The applications of Augmented Reality & P2P thus as can be seen by the buzz online is endless.
Peer Service Delivery Mechanism
Peer-to-peer systems (P2P) have attracted much current attention as a popular way to share huge volumes of resources directly within peers. Existing service discovery protocols and delivery mechanisms designed for decentralized peer-to-peer systems tend to be very inefficient in locating peers and retrieving services, either generating too much load on the system, or providing a bad user experience.8 But much research is going on to find potential in this domain.
Autonmous Peers can pool in efforts to indulge in data-trading and other forms of sharing to reduce community based redundancy systems.9
Proximal/Proximate Discovery & D2D
Using P2P networks, one can establish Proximal Networks supplementing internet, one can use this for Advertising, Communication & Social Networking. Qualcomm FlashlinQ is based on the same using D2D NAN (Neighbourhood Area Network).
The others are basic issues with P2P systems like privacy, security etc. and their use cases especially in proximal P2P. The following Diagram visually represents the level of interplay between the technologies asked to be researched