I may be in the minority with this, but I would be willing to pay that much extra for added 4G/LTE. I have only used 4G a little, on my brother's phone, but its download speed blew my 3G speed out of the water.
And what is the use of that high speed when most of the plans have a Data limit? Its not that you can use it as a torrent box, with 4g my data limit would be hit in a minute.
I don't plan on using it as a torrent box. My uses would involve: being on the train and working on documents in Google Drive and other cloud services, with maybe some music streaming in the background; using the GPS to navigate to a destination; watching the odd YouTube video now and then, to show my friends; surfing some news websites and Facebook/LinkedIn when bored; looking up some help on Stack Overflow or something, when programming; and downloading roms (not ISOs) or software/updates. If there's Wi-Fi available to me, I would use that; in all other instances, I would rely on the 4G.
My family is currently on a shared "4GEE" plan from EE. This means that for £37.50 a month, I have 20Gb of "double speed" 4G (apparently twice the speed of normal 4G) data, with unlimited calls and texts. As well as this, my mum, brother, and dad also have the unlimited calls and texts, but share the 20Gb of data with me. Their contracts are £12 a month each, and also double speed 4G. My dad barely uses mobile internet, my mum doesn't. My brother does, but mostly uses Wi-Fi, unless he's not at home or college. New data-only sims card can be added to the shared plan for £5 a month, and if I get one of those, I won't be using my phone's internet anymore, but instead the Pyra's, with the majority of the monthly 20Gb available for my use.
It may seem like a waste that most of my family doesn't use 4G even though we have it. But switching over to this shared plan has actually halved our combined monthly contract bills, and those that do want access to 4G (my brother and I) have it. I don't think I'll be reaching my data cap any time soon, based on past usage patterns.
Disclaimer: I would like to clarify to all that I don't know much about how hardware works or would be implemented. So when I say I'd want 4G, I don't actually know how much of a burden that may put on the developers, in order to implement it. I make these requests based on my personal plans to use the Pyra. So if I ever make a request that sounds unreasonable, either for the developers or other users, please understand that it comes from a place of ignorance and that I'd completely understand if something that may seem simple to me would actually be completely impractical. If I ever do make one of these requests, I'd appreciate being "schooled" in why it may not work, or other factors to consider.