$500/month for 350Mbps! What exactly is Elon been smoking?! Okay, it's mobile... given you have electricity, of course, but if you have electricity, won't you have other options as well?
No. There's a huge chunk of North America by area that does not have 100+mbit/sec broadband.
Most of those areas don't have huge population, but those who are there sometimes are there for good reasons.
Starlink is wonderful for those people.
There are a lot of people who have delusions that Starlink is going to have a significant impact on mainstream wireline broadband providers, which is absurd, but there's a lot of the world that still has nothing even close to what this service offers.
If (and this is a massive IF) they get the laser linking working it'll be huge for the aviation and marine worlds but even as is it's the best thing to happen to rural broadband service in years.
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Personally I hope they get mobile service for RVs working soon, all I need to work is reliable low-latency internet access so if I can theoretically get it from anywhere in the country I am free.
For those who are in the cities (like me), we have access to "hyperfibre" which is like 2Gbps which costs about $150-$200 NZD a month (unlimited).
They've even been trialling 10Gbps! https://company.chorus.co.nz/chorus-supercharges-new-zealand...
Maybe you have an ISP and want a backup, or maybe you have limited bandwidth and want more, etc.
This thing is also mobile. Maybe you are touring show/band/tradeshows and sometimes venue provided internet is crap and want a backup.
Or maybe you are youtube/regular TV show inspired by mythbusters , that needs to go to desert/exotic locale to test/blow something up.
And even where there is an options its sometimes really bad and expensive.
This probably won't set world on fire, but I see it quite useful to number of companies.