Some guy checking it out with his wife asked out loud "where's the Ethenet port?" Seriously? You're still asking for one?
I honestly think most of the world must just spend all their time tweeting or something if they can't notice the obvious and stupendous superiority of Gigabit Ethernet over any form of WiFi in existence.
Even in the same room as my dual-radio WiFi router, my 802.11N connection is like 1/4 the average throughput as using a Gigabit connection. I suppose if all you use is a relatively slow Internet connection and/or never transfer large files between other computers on the same network you might not notice and think that wires are a waste of time, but believe me when you start getting further from the router and are watching HD streams or copying a movie file over, it's NIGHT and DAY.
The mere fact that even if you don't always use all the bandwidth that it's available and VASTLY SUPERIOR to WiFi should be reason alone to leave it on the MBP. But here's a case of choosing THIN over functionality and it's a shame. If they just had a smaller non-standard port with an adapter, it might be tolerable, but instead you will have to use another port that is in extremely short supply (either Thunderbolt or USB, either of which only has a lousy two connectors on-board thus requiring you to carry a hub with you as well in many cases). The (Mariott) hotel I stayed at for nearly two months on business last year only had high-speed Ethernet in the rooms (I created my own WiFi connection for my iPod Touch using the MBP). The point is that the standard is still the wired standard and WiFI is not a replacement for a hard-wire connection and never will be (always less secure and always going to be slower than what's possible with the latest wired connection).
Apple is trading high-end features for 'thinness' and that's downright STUPID on a "Pro" notebook, IMO.
Care to explain how does USB3 render Thunderbolt obsolete?
I would say it's more like it's probably going to be relegated to niche markets just like Firewire was, but then I've said this since Day 1 and for obvious (cheap/mass-market/backwards-compatible/fast enough for most consumer uses and vastly superior to USB2 in all respects) reasons.