I fail to see why this is either a good or a bad thing. It's Newegg emulating Amazon, without branching out into absolutely every market (yet).
Let's look at the business model, and see why there is nothing special going on here.
From basic business models, we understand that initial pricing has to be high and service has to be good in order to win customers over. You first have to beat out competition to bring the customers in the door, and then have to give them a reason to stay with you. Newegg had this phase about three years ago. Their pricing was generally great, and their service was next to none.
Transitioning into phase two, the business needs to turn a profit. Here's where things get sticky, and that service level has to retain customers. Your pricing adjusts higher, so that profits will be realized. You may not be the best pricing out there, but loyal customers and superior service bouy you in the consumers' eyes. Newegg hit this about two years ago, whenever they introduced the daily deals and shell shockers for the first time. Pricing was more in line with other retailers, except for the "special" deals that brought consumers in.
Penultimately, the pricing inflates further to either the level of competitors or above. Customers are fiercely loyal, and your level of service is justified in their minds as being worth the cost. You offer specific items at a value price to get people in the door, but once in the door pricing is not the draw. This phase is hard to pin down, but for Newegg it ended when they introduced the Neweggflash program.
Finally you diversify, reward, and start over again at step 1. New items draw a more diverse consumer in, and get them to peruse your old catalog. Maybe the person who needs diapers also determines that they need a new mouse for an old computer due to abuse from a fussy toddler. You sell the new item at near cost, and make money from the mouse. Soon the consumer is loyal, and you can start "rewarding" that customer. Amazon and Newegg are pioneers in the rewards department, such that they actually make you pay for the rewards now. It used to be free 3 day shipping at Newegg, which has been cut back to the much cheaper egg-saver variant. Prime introduced "discount" shipping for an annual fee; Newegg decided to do exactly the same thing. Amazon branched out from books into everything under the sun; Newegg is branching out with other sellers and the flash deals. If you want to see Newegg's future then you need only look at Amazon.
To the point of delivery, 2-day delivery is a joke. When I was in MN it was 3 day delivery taking 3 days, but the processing usually took less than 3 hours. I would order in the morning Monday, and have it at my door Thursday. I currently live in NC, and it is a 2 day shipment, that generally takes 3 or more days. Order Monday AM from Newegg, order doesn't process until Tuesday, then I have it Thursday. The Premier service cuts that day+ of processing off, which means I can get my crap by Wednesday. Amazon isn't bad, but most of the things I've ordered from them came from other sellers. Both Newegg and Amazon services sucks hard whenever it comes to other sellers.