In Back to the Future 2 a 1989 American science fiction film, Marty McFly and his friend Dr Emmett "Doc" Brown travel from 1985 to 2015, the most notable thing is that he walks into a world of hovering cars and 3D images that popped out of the screen.
Augmented Reality (AR) is the nearest we have come to this reality. By definition, AR is a technology that superimposes a computer-generated image on a user's view of the real world, thus providing a composite view.
Virtual Reality (VR) works hand in hand with AR most times, by definition VR is the computer-generated simulation of a three-dimensional image or environment that can be interacted with in a seemingly real or physical way by a person using special electronic equipment, such as a helmet with a screen inside or gloves fitted with sensors.
Because AR is a close to new technology there is, of course, a few limitations to note
The applications for AR and VR are limitless!
Some of the notable applications that run this feature are the Pokémon GO game where users would play a game fully immersed in the real world, another notable application was Google's SkyMap which mapped constellations over the night sky from wherever you are.
The take away here is that AR runs on ARCore so your device has to have support for this feature for you to enjoy the full features.
Here is a list released by Google and Apple the top mobile device makers.
Phones with ARCore support
Apple
iPhone 6s ($99 at Back Market) and 6s Plus
iPhone 7 ($169 at Back Market) and 7 Plus
iPhone SE ($110 at Back Market)
iPhone 8 and 8 Plus
iPhone X
iPad Pro (the 10.5-inch model, 12.9-inch model and the older 9.7-inch model)
iPad (2017)
Asus
ROG Phone
Zenfone AR
Zenfone 6
Zenfone ARES
General Mobile
GM 9 Plus
Pixel and Pixel XL
Pixel 2 and Pixel 2 XL
Pixel 3 and Pixel 3 XL
Pixel 3a and Pixel 3a XL
Nexus 6P
Nexus 5X
Huawei
Honor 8X
Honor 10
Honor View 10 Lite
Honor V20
Mate 20 Series
Nova 3/Nova 3i
Nova 4
P20/P20 Pro
P30/P30 Pro
Porsche Design Mate RS
Porsche Design Mate 20 RS
Y9 (2019)
Infinix
Note 6
LG
LG G6
LG G7
LG G7 One
LG G8 ThinQ
V30 and V30S
LG V35
LG V40
LG V50
LG Q6
LG Q8
Motorola
Moto G5S Plus
Moto G6
Moto G6 Plus
Moto G7/G7 Plus/G7 Power/G7 Play
Moto One, One Power
Moto X4
Moto Z2 Force
Moto Z3
Moto Z3 Play
Nokia (HMD Global)
Nokia 6 (2018)
Nokia 6.1 Plus
Nokia 7 Plus
Nokia 7.1
Nokia 8
Nokia 8 Sirocco
Nokia 8.1
OnePlus
OnePlus 6T
OnePlus 6
OnePlus 5T
OnePlus 5
OnePlus 3T
OnePlus 7/7 Pro/7 Pro 5G
Oppo
R17 Pro
Reno 10x Zoom
RealMe X Lite
Samsung
Galaxy S7 and S7 edge
Galaxy S8 and S8+
Galaxy S9 and S9+
Galaxy S10/S10+/S10e/S10 5G
Galaxy Note 8
Galaxy Note 9
Galaxy A3 (2017)
Galaxy A5 (2017)
Galaxy A6 (2018)
Galaxy A7 (2017)
Galaxy A30/A40/A50/A60/A70/A80
Galaxy A8 and A8+ (2018)
Galaxy Tab S3
Galaxy Tab S4
Galaxy Tab S5e
Galaxy J7
Galaxy J5 and J5 Pro
Sharp
AQUOS R3
Sony
Xperia X
Xperia XZ Premium
Xperia XZ1
Xperia XZ1 Compact
Xperia XZ2
Xperia XZ2 Compact
Xperia XZ2 Premium
Xperia XZ3
Xperia 1
Tecno
Phantom 9
Vivo
NEX S
NEX Dual Display Edition
Xiaomi
Mi 8/Mi SE
Mi 9/Mi 9 SE
Mi Mix 2S
Mi MIx 3
Pocophone F1
Zebra
TC52 WLAN Touch Computer
TC57 WWAN Touch Computer
TC72 WLAN Touch Computer
TC77 WWAN Touch Computer