Its Gov.uk, and especially through the pandemic there are going to be so many people using the Gov.uk service platforms.
Just the way it works, at the very top, Government, Royals as someone pointed out, the situation is a .UK situation and next will come the toffs and after that you and I.
What is up in the air is timescale but simple reality is .UK is more flag waving and this is post Brexit Britain that's going to be very interested in a lot of flag-waving once those Trade Talks really get down. I'd be shocked if a major initiative was launched on .co.uk as opposed to .UK as a platform. .UK just sends the message faster, sleeker, punchier. It's the Royals, the Gov, the idyllic British Villages, Tourist Attractions, .UK is UK's chance to have a TLD that's globally renown, means something, intrinsically British, isn't just about what's going on in the UK but is also about what the .UK can offer the world!
I can see the campaign 'At '"World Class UK company name"', we are switching over to our new .UK platform, to show the World Britain is open for business once more, a new more United Kingdom.... ready for tomorrows challenges... inclusive, united.....with our World Class Engineering/Customer Service/Green technology... yadiyadiya.."
There are no comparison comparing .com with .co cos first of all .com is the global standard domain suffice that has no peers but more importantly .UK actually means something whereas .co doesn't exactly roll off the tongue in meaning.
If there's only a 3% chance that one of the big boys Amazon, Google, Argos etc will switch to .UK each year over the next ten or 15 years that small possibility starts edging nearer to a certainty over time just to distinguish themselves. Meanwhile .UK could stagnate, but once the flame is lit that's it because the situation is one of public consciousness not just what the stats say or trends. Another possibility is an influencer, just one who blows up, launches on a .UK platform, big marketing, a new idea.... all possible.
As pointed out if you are a new domainer and all we had was .co.uk you have a steep climb because of how tight it is but if you look at .UK the pricing, in some cases beer money, and consider what that could become if .UK starts trending as a domain then you got little to lose and potentially something to gain. .UK is a beauty just waiting for it's ball.
With .UK you are talking about half a dozen astute buys, see what happens, you don't need to remortgage the house unless there's something you can't live without, and you may just gain.
Disclaimer I'm small change in domaining, so just having a say but I'm expecting a prime.co.uk ending up with 60 or 70% value of an identical prime .UK in the long term. Now what's important is all .co.uk owners had their 5 years to grab their .uk's and cover both possibilities. So shouldn't matter either way to them how it ends up.
If you own a .co.uk you wouldn't sell for less than 10k and because of this you regged during the 5 years it's twin sibling in the .UK and that is currently worth 1k in a fair wind, then that's still 1k more than the 4quid you spent regging it. Your covered, either way, happy days, have a beer. I don't see any argument that you tend to see that asked so often; the question being why isn't the .UK also worth 10k? Why should it be? The UK economy didn't double overnight just cos .UK was launched, values of both could be trending up [premiums], and .UK could end up stealing value from .co.uk so it's complex in that sense. Bit like Canary Wharfs stagnant start, and it's position relative to the City nowadays.