Not true. RT runs the entire Office 2013 suite, all of the Windows Administrative Tools (defragmenter, resource monitor, task scheduler, etc.), Windows Accessories (calculator, character map, notepad, paint, etc.) Windows Ease of Access (magnifier, narrator, speech recognition, etc.) and Windows System (command prompt, file explorer, task manager, etc.).
These are not "ARM versions" but native Win 32s running in Windows RT on an ARM processor. Just like Office 2013, Microsoft ALLOWS these to run. Microsoft *could* allow all regular Windows programs to run in RT (like Office 2013) if they wanted to.
The only thing stopping a Surface RT or Surface 2 from installing and running regular Windows apps is Microsoft not allowing it. They want to keep it a closed system. If Microsoft wanted to allow, say, Photoshop to run on RT, it would be easy to do. There is no technical limitation to it.
I think RT is the future because it only makes sense that it is. RT devices are "always on". When you get an email on a Surface 2, it will tell you right away. The Pro, Pro 2 and Pro 3 (I believe) go to sleep like regular computers.
Strategically, MS should start moving applications to the Windows Store and keep optimising RT for performance and battery life.