PhD research, research doubts? I am a computer science PhD candidate. I have been reading and learning a lot of my interested research area - and now it's time to formally defend my research proposal.  

There is a computer architecture that has already been discussed (online articles) over blogs and videos and some companies are using it already. it's relatively new architecture though (2 or 3 years old). But I haven't found out any academic research done on that architecture for deploying/implementing it with use cases. But it has been referenced (online article, blogs etc) in academic research journals and articles.  

I was thinking to write my PhD research on that new architecture with proper use cases and references. But at the moment I am having doubts about whether I should proceed or not? Or what approach should I apply in order to proceed? 

Your suggestions/opinions will be highly appreciated either positive or negative.
Don't stress too much for your proposal. In all likelihood your PhD will evolve as you progress. As you said you've been reading a lot. Don't be surprised if there is little material to reference. After all, that is the point of doing Ph.D. research: you will be adding to an area of knowledge which at present is little understood.

My Prof once told me that in year 1 the student should be guided, in year 2 the student finds their feet and in year 3 the student leads their supervisors

And yes, speak with your supervisor. This will answer your doubts and display you are really commited to being rigourous.