Did you think that Google's Instant Apps, where you can run Android programs without installing them, would be useful on other platforms? You're not alone. Microsoft has launched a preview version of Playable Ads, which let you try Windows 10 titles without downloading anything. Click a promo and it'll stream the full app for 3 minutes, giving you a feel for how the software works without forcing you to quit what you were doing before. If you're riveted enough to explore further, you just have to click a Windows Store link when you're done.