In either case, you will still at least get updates and the RT will stay good for at least 7 years (maybe). The tablet will probably give out before then, though.
I did read an article at Softpedia.com last night where there may be a low budget tablet with the same dimensions of the Surface 2 but powered by the ATOM "Cherry Trail" CPU. This CPU is better than the "Bay Trail" and will do full screen HD video streaming
flawlessly. PLUS, it runs cool. This particular tablet will be x86 and will run anything.
An official word of its existence should be released in the next BUILD conference in June or July. The fate of the RT models should be announced then also.
I can tell you that the i3 model of the Pro 3 has been an outstanding machine. I have had zero problems from it and the 12" screen is almost perfect. It is a lot cheaper than the other two models even when you add the keyboard and is almost as speedy as
an i5. Those have been discounted at times and you can get that Pro 3 plus the keyboard for less than $1,000. The sound system is superior also. No need for external speakers (and stereo).
However, you can wait to see if the Surface 2 replacement actually comes available and the ATOM series CPUs they have now are real good performers. They do run cool also.
As for replies from Microsoft, the employees have a 'gag order' and are not allowed to talk about them even if they know. They are only allowed to talk about what is officially released. Most companies do that today.