Google I/O is just around the corner, and some are predicting that a Samsung-built Nexus 11 tablet will be shown off at the event. Why? Because a set of hardware specifications have made their way onto the web courtesy of a leaked Samsung 2013 product roadmap.Three reported features of the Nexus 11 stand out. You’ve probably guessed one already: an 11-inch display. It might sound like a big change, but it’s really not. Screens are measured on the diagonal, so an 11-inch Nexus won’t necessarily be any harder to handle than the Nexus 10. Samsung will probably trim off a little excess bezel (but not so much as to make gripping tricky), and consumers will barely notice the difference.Next is the fact that the Nexus 11 is rumored to pack an Exynos 5410 processor. That’s the Samsung chip based on ARM’s big.LITTLE spec, and it features 8 total cores. Four are ARM Cortex-A15 powerhouses and the other four are efficient little Cortex-A7s. This should allow the Nexus 11 to deliver an excellent balance of power and performance — much better than the Nexus 10’s dual-core A15 chip.Here’s the real kicker: SamMobile is reporting that the Nexus 11 will have a microSD expansion slot. Yep. A Nexus device with a microSD slot. That’s enough to get Android die-hards salivating on its own. But let’s not get carried away: this is all speculation until we actually see a Nexus 11 and someone shows us where the card goes.Will the Nexus 11 actually show up at I/O? It’s hard to say. The original big screen Nexus slate — the Nexus 10 — wasn’t in attendance in 2012. It wasn’t announced until October and then went on sale in November.That’s not to say Google has a rigid release schedule to stick to. The Nexus 7 and 10 were launched at different times and the Nexus 7 was later refreshed with very little fanfare.