PlayStation VR is expensive enough by itself, so you probably don't relish the idea of spending more just to get a taste of what the PS4 headset is like. Thankfully, you won't have to. Sony has revealed that PSVR's accompanying demo disc will include samples of eight games. A handful are definitely lighter releases that serve more as showcases (PlayStation VR Worlds most notably), but there are also tasters of games you might well buy later. You can play demos for Battlezone, Driveclub VR, the ubiquitous VR sampler EVE: Valkyrie and RIGS: Mechanized Combat League, among others.
This lineup surfaced on Sony's European PlayStation Blog, so don't be surprised if the lineup changes depending on your region. Should it remain largely intact from country to country, though, it's good news for many future PSVR owners. Yes, the demos are ultimately there to get you to buy games, but the breadth is important. You won't run out of things to try minutes after opening the box, and you'll get a genuinely diverse range of experiences that will give you a feel for what's possible in VR. That's particularly important when many players will know very little about VR, let alone have first-hand experience.