Short answer (as an O.C. resident) is yes.
Now, a few random thoughts / observations.
Way back in the previous century, Amtrak used to run a line called the Desert Wind, that ran from Los Angeles to Chicago ( I think it switched or hooked up to the California Zephyr in Ogden), but it had a stop in Las Vegas. We tried it once, to avoid driving and/or the hassle of air travel.
Without double checking, I want to say the Desert Wind was only a LA to Las Vegas train back in the 20th century. I think it stopped in the late Clinton era. It is one of the lines Amtrak wants to restart again, but they don't have enough spare equipment for it at the present time.
The California Zephyr is a separate train that thankfully still exists, running from Chicago to San Francisco across northern Nevada.. The California Zephyr has some of Amtrak's very best scenery over the Rockies and Sierras, seconded only by the Coast Starlight from LA up to Seattle.
I took the Coast Starlight routinely back in the 1990's and 2000's when the President of Amtrak West (forgot his name) turned it into Amtrak's premiere train with good food and a separate First Class domed lounge car for Sleeping Car passengers only. Truly fantastic train travel! And around 9pm on that first night out of LA as cocktails flowed, that first class dome car could really be a fun party!
While I've never experienced a true Japanese "Bullet Train", I've been fortunate enough to travel via HSR in Norway, Sweden, Spain, France and Germany. Some service was better than others, but they were all pretty great. (TGV non-stop from Paris to Bordeaux was fast, smooth, and hassle-free.) If Brightline can come close to that, I think folks will value it as a real alternative to other modes of travel.
I think for most Americans under age 70 whose only experience with passenger train travel has been Amtrak, the Brightline level of service will seem like a huge step up in amenities and polish.
That said, I've taken Gran Class cars on Japans bullet trains, and that's truly impressive. But just having Brightline be noticeably better and fresher than Amtrak while doing 125mph is going to be a big improvement for most Americans.
Brightline is already getting rave reviews from Floridians, that's for sure.
And a fun-fact (or perhaps a fun-rumor): That restaurant on the second floor of ARTIC (some sort of oyster house?) had many delays in opening. One of the reasons was that they had ordered permanently-mounted single post tables for their terrace seating area. What they failed to realize was that one of the components of the building's LEED Platinum certification was radiant heated floors. The placement of the tables would have drilled into the system, so they had to order freestanding tables instead. Oops.
Fascinating! I remember the delays. Anaheim was so desperate to get ARTIC doing something, anything, once it opened and none of the promised passengers showed up. Even in 2015 it was obvious that California High Speed Rail was floundering, and it would be at least 15 years before it arrived in Anaheim. Anaheim leaders knew they'd made a huge and costly mistake with ARTIC almost the moment it opened.
Things have only gotten worse for ARTIC since then. It's an epic disaster, hidden by the fun light show on the bubble roof.