Android phones, apps and tablets

New to Android question.

I recently got a Nexus 4, going from an iPhone 4 and am enjoying it a lot but one thing; how does the upgrade process work, is it the same as iOS, you just get notified there is an update and can download it?
Nexus owners should be able to download it as soon as it comes?

If the new Nexus is a similar price point as the current one i'm tempted to get one too, the specs look good.

.....the highlight being a 1920 x 1200 display resolution, leading to a fine 323ppi pixel density. There's also 2GB of RAM, a 1.5GHz Qualcomm Snapdragon S4 Pro 8064 processor with Adreno 320 graphics, and the rear camera's resolution is 5 megapixels.....

http://www.theverge.com/2013/7/24/4551878/new-nexus-7-best-buy-pre-order-details-specs-price