I don't know, I think this will just end up confusing people again just like the RT did...
I admit that I had the same gut reaction...then I paused and realized that consumers are already accustomed to choosing amongst various models within the same brand.
I don't know whether it is Apple or "something in the air" that has all of a sudden caused us to "panic" when we see multiple offerings within a single brand, but in the case of the Surface line, I really believe this has now simplified things for the average consumer.
Putting aside that any skilled (or unskilled, for that matter) salesperson can make an unsuspecting consumer buy the wrong product, with all things being equal, now the consumer sees "Surface" and "Surface Pro" and I'm sure most would conclude that the Pro version offers something "more." Then the next question would be, "Well what's the difference between the two?" This is where it becomes easy to describe the Pro version as the one for heavy-duty workstation computing such as development, multimedia creation/editing, etc. and the non-Pro version as a lower-end version that will--at best--run the same applications, but only slower.
The bottom line is that at least the Windows consumer is now going to select a Surface model essentially based on his/her "horsepower computing" needs; this is exactly what he/she has been doing with traditional laptop/desktop PCs. With Surface RT, on the other hand, even if the consumer's horsepower computing requirements were light but consisted of regular Windows applications, then--if they were skilled or lucky to encounter the right salesperson--they were able to purchase the right Surface model for their needs. We all know that this was not the case and many bought Surface RTs only to eventually meet disappointment and frustration because they could not run/install their old apps.
So now that everything is Intel-based, the consumer just has to choose the Surface model with the computing power that meets his/her needs; something that he/she has already been doing even before the Surface or iPad were on the market.