Computers are changing. But it's not the changes in Windows 7 and new Ubuntus that are worth a damn: try Google Chrome or Amazon Fire.
Amazon Fire has a new WebKit-based browser called 'Silk' that actually connects to Amazons SUPERMASSIVE and super well-connected datacenters and sends back an optimized version of the web suitable for your device. Kinda like how Opera sends out optimized pages, but Silk even models your behavior and starts sending likely pages you will click on next. I think everything comes in one packet rather than stupid HTTP requests back and fourth for every single resource (as many as tens/hundreds on a manys of pages). I don't think the connection is persistent, but as you can imagine anywhere in the world the connection to amazon servers will be superfast. (this raises huge privacy concerns but w/e)
So the effect we have is that the web is going to be quite close to native apps fairly soon in terms of responsiveness.
Additionally - and I've been expecting this for a while - devices (and especially non-Apple devices) are becoming SUPERCHEAP and also the producers are making MORE and MORE money from content distribution systems. I've heard reports that Amazon are actually selling the Fire at BELOW COST. Also, I got a Kindle in June this year (now pretty outdated!!) and I have free unlimited 3G internet on it everywhere in the world for browsing and downloading books .
Will these concepts make it into the future???????????? No question.
Google are clearly getting into the same space and they would love to pull off some Silk-like job (this is a HUGE job and afaik Amazon are in some sense worlds ahead of google when it comes to what they can do with their datacenters). I don't give a balls about Android Google Chrome OS is going to do amazing things. E.g. every new student in my university will be getting a free Chromebook starting next year (these aren't cheap and all our universities are broke so I've no idea how this is to be funded - probably Google paying for a cheap experiment and cheap PR/marketing).
Anyways, there are limited jobs we want to do on our computers and not on the web. Take a look at what computer you're using right now. What would you miss if it was 10 times more compact, made no noise, lasted you 2 weeks without a recharge and generated no heat, was constantly connected to the web anywhere in the world and could run limited native applications beyond a web-browser? Perhaps some work-related stuff, but you bet there's a plan to fix that problem and in any case, there are at least a billion people who would take such a cheap/free device, and spend 5 hours a day on it.
The future is the web, the troubling thing is if Apple get their way the future is an Apple store.