After taking a back seat to consoles for the past few years, personal computers are enjoying a resurgence in gaming, thanks to the popularity of e-sports, customizable machines and faster software releases. From a report: This week's Tokyo Game Show will feature a main-stage tournament for PlayerUnknown's Battlegrounds, a hit online survival PC game that's been downloaded more than 10 million times since March. Sony's PlayStation 4 and Microsoft's Xbox One consoles are heading into their fifth years, while Nintendo's Switch is in a bit of a lull before new titles are released for the year-end holiday shopping season. Spending on gaming-ready PC rigs are on track to climb an average of 6.6 percent per year through 2020, while the market as a whole is projected to decline 3.8 percent annually, according to Gartner. Revenue from PC titles will grow by 3 to 4 percent over the coming years, while console-game sales are seen flat, according to DFC Intelligence. Written off years ago for being too expensive, complex and bulky for mass appeal, gaming PCs are seeing a resurgence that could even threaten consoles, according to Kazunori Takahashi, Japan gaming head at Nvidia. "The abundance of titles and the popularity of e-sports is bringing a lot of excitement to PC gaming," said Takahashi, whose employer supplies graphic chips to PC and console makers. Even in Japan, "it's not unreasonable to think that PCs can eventually become a presence that threatens console gaming."