Well, I would like to try and lay out a middle of the road position. I don’t claim to be an authority, but at the same time I have used charcoal and gas extensively and now have logged a fair number of cooks on my Rec Tec “Bull” pellet grill.
First, I can understand the purist view that the company that pioneered the charcoal kettle should stay “true.” However, had George

not listened to others at Weber and authorized the Genesis project there is a good chance Weber would have disappeared. And, we would not have a whole legacy of great gas grills. Are gas grills a “compromise” or worse a “sell out?” In my opinion, yes and no. You can do really good low and slow bbq on one - if you know how to use wood chips, etc. - but it can’t really beat charcoal and wood. On the other hand, gas grills open the door for excellent high heat cooking with ease of use that at least takes cooking outside (where it belongs

). I wouldn’t want to abandon EITHER my kettles OR my Weber gas grills. So, I don’t think adding the Genesis to its repertoire was a sell out on Weber’s part; it was a great
addition.
Now comes pellet grills. I have posted a number of times that I suspected Weber was hard at work on one of these - or they were crazy and in trouble if they weren’t. I do believe this is another time of paradigm shift in the grill world. Weber was in danger of being left behind in the 1980s and again now with the pellet grill advent. The $64K question is whether their entry is a quality built game-changer (as the Genesis was) or just another Traeger. Too early to know yet.
Do pellet grills work? For me, yes. I have found my Rec Tec to be easy to work with and pretty easy to clean (once I got a small shop vac for the job). I do recognize, though, that there are both electronics and moving parts, so breakdowns are inevitable. That is where having a good company behind your grill is that much more important for a pellet grill. Rec Tec has outstanding customer service. I hope the better side of Weber will prevail for this critical new product that is bound to have teething pains (already being talked about based in Chris’ comments). If Weber builds them better than their competitors and stands behind them, they have a good shot at getting some serious market share. (Hopefully the competitive pricing reflects a desire for that market share and not wholesale compromises on construction quality.)
Finally, pellet grills - at least my Rec Tec - deliver reliable, and very good bbq. I enjoy experimenting with wood pellet flavors, and the superb (and subpar) results some have reported may have more to do with the brand of pellets being used than the grills themselves. I would agree that my Big Green Egg can do pork shoulders a little bit better. But even there, the big selling point of the high priced Egg (mine was a gift) is its relative ease of use, sometimes described as almost “set it and forget it.” So is using charcoal and wood in a Green Egg “selling out” when you can get just as good results with a basic kettle if you are willing to work extra hard at it?
My Rec Tec will never push aside my gas grills. If this Weber pellet grill can really hit 600, I could see using it more for fast high heat grilling, but I still would want a gasser. And I still DO enjoy slow bbq with my kettles when time is on my side. The big victim of my Rec Tec acquisition has been my Green Egg, despite how well it performs. I can do almost as good bbq, and I can monitor results including set and actual temps and two meat probe temps all while working at my office. I can even adjust the temperature settings

! If I was retired and had a lot more time, that may not be as big a deal, but my Rec Tec makes it possible for me to do long cooks even on a workday.
Sorry for the looooong post, but this is something I have been waiting for and have thought about a lot.
Last comment: some years ago I was in a professional bbq contest where my team competed with our Green Eggs in the amateur “back yard” division. I took definite note that most of the professional teams, including winners, were using pellet grills. I think that says something about the results. I have had plenty of compliments and nice smoke rings with no fiascos using my Rec Tec. I hope Weber’s pellet grill will be even better! If it is, I don’t feel it will represent a sell out but rather another cool addition to the Weber lineup. The fuzzy picture at least LOOKS good!