The 13" rMBP isn't competitive pricewise versus the classic 13" either.
That's not really true. A 13" cMBP with the same config is $200 cheaper than the base 13" rMBP. I think it's quite competitive... for $200 more, you get a better display, better thermal management ( so far at least, it runs significantly cooler than previous models ), a smaller footprint, a lighter machine, an additional TB port, an HDMI port ( the USB port positioned on the right is also more handy than having both on the left... but let's say this is subjective ) and slightly higher clocked graphics.
Sure, although you gain the above, you lose: Ethernet Port, FireWire, Kensington Lock and Superdrive. Maybe more important to some: You lose the ability to upgrade it yourself ( adding 16GB of memory if you really feel the need for it or a bigger capacity SSD later down the road ).
So, it really comes down to preferences and needs. If you're a system administrator and you find yourself quite often on the field, needing to connect via Ethernet to other stuff, then either get an adapter for the rMBP, or if you hate that, get the cMBP. Also, do you want an IPS screen or not ( I won't say "retina", cause that doesn't matter that much to me... what does matter is the quality of the screen and viewing angles )? Do you still use CDs / DVDs often? I for one ( and I'd risk guessing that: "the majority of people" ) don't... but I did get the USB Superdrive, "just in case" ( it might happen that I need to extremely rarely install something from a DVD ).
Anyway... $200 difference and the things you get by going with the 13" rMBP compared to the 13" cMBP are IMO, well worth the price
IF you don't mind loosing user-upgradeability, Ethernet, FireWire, the Superdrive ( but you can still use adapters if you want... so you're not really loosing those ports "forever" ) and the Kensington Lock.
PS: I did not mind losing user-upgradeability because by the time the notebook gets so slow that it can't handle the stuff I throw at it, no amount of RAM or SSD will make a "life-changing difference" ( considering I already have an SSD and 8GB RAM is quite enough if one doesn't do any video encoding, 3D rendering, running a ton of VMs simultaneously and similar ). When that time comes, it will be replaced with the newest model I can find that suits my needs.