That's good. Now let's see when we actually get it.
One thing I don't get about Android is why manufactures are so slow to update to the latest software. Now granted some older devices can't handle the update, that I understand. But I am referring to the newer devices and why are the likes of Samsung and others so slow to release the update?
Samsung modifies stock android very heavily. As a result, when an update gets released they have to make those modifications again to the new base, along with any design change they themselves are making. It may take months for these changes and testing.
Contrast that with a manufacturer like Motorola, who runs basically stock android with a few additions, and they're able to get updates out just as fast as googles nexus devices - within a couple of weeks of release.
The above requires that the decision to update has already been made. It costs a company manpower and resources to make the update. The more they deviate from stock android the more work required. They're ultimately in the business of selling you devices, so if a device is aging they'd rather try to sell you a new one than keep putting resources into updating a device with an ever dwindling user base.
Sometimes the device can't handle it, sometimes the manufacturer doesn't think the effort to do it is worth it. Finally, if the device is tied to a carrier they can control when the update goes out. Verizon in particular is known for holding them up for testing on the network. This can add weeks or months to the wait.
If you want fast, quick updates be sure to take the manufacturer into consideration. Googles nexus line is always the first to get it, and they're even giving the 2012 nexus 7 the lollipop update at almost 2 1\2 years old. Google also controls the update schedule so the carriers have no say. Motorola has also been quick lately, being just as quick as nexus with the moto g, e, and x lines.
Just some things to consider