I couldn't care less about European standards.
No matter how many superchargers there are, there will always be situations where a plug-in hybrid is more convenient, but that's not enough of a reason for me to want one of those.
A plug-in hybrid is an alternative to an electric car, whereas better charging is an augmentation to an electric car. Switching to a plug-in hybrid means dispensing with all the good qualities of an electric car, while better charging (as an option) has no downsides.
It's important to look beyond the Model S, beyond the Model X, perhaps even beyond the Model 3. People will want charging available ideally anywhere they might stop while on a longer trip. It isn't enough to have supercharging every few dozen miles, when people want to stop at a specific restaurant that might have an incompatible rapid charger. Avoiding that situation would be a good thing.
I also really think you underestimate Tesla's ambitions for the supercharger network. I fully expect them to outnumber the CHAdeMO/CCS charge points in the UK in 3 years time. There are 32 supercharger points (that we know of) in the UK already, vs around 250 CHAdeMO or CCS points, and Tesla have barely started. The installation team who put the Bristol SC in said they were contracted to install 10 more UK supercharger locations by Christmas and they are rumoured to have signed deals with two of the large supermarket chains to put SCs in their car parks.
When talking about the utility of the supercharging network, the number of locations is just as important as the number of chargers. Even looking forward to 2016, the UK will have around 23 supercharger locations (according to the map), which the CCS/CHAdeMO outclasses with ease even today. I feel quite comfortable saying that the number of supercharger locations will never rival the number of CCS/CHAdeMO locations, for several reasons:
1. Tesla strictly speaking doesn't need to put up superchargers closer than 200 miles from each other. For CCS/CHAdeMO, this figure is closer to 50 miles. So, you basically need four times as many CCS/CHAdeMO as tesla superchargers for equivalent utility.
2. Teslas don't have any need to charge on trips up to 200 miles, the equivalent figure for other EVs is around 50 miles. Now, I don't have detailed statistics showing the percentage of trips that are 50-200 miles vs 200+ miles, but lets say the need for rapid charging on low-range EVs is three times as high.
3. Tesla doesn't have 50% of the market. If you look at Norway, you'll probably have sold around 70,000 electric cars by the end of 2015, and of these, maybe 10,000 will be Teslas. This gives Tasla a market share of ~15%, and this is in Norway. (We love tesla.) If other electric cars outnumber Teslas 7:1, you'll need 7 times as many chargers.
4 x 3 x 7 = 84
You'll need around 84 times as many CCS/CHAdeMO rapid chargers as Tesla Superchargers, for an equivalent coverage. Of course, you can probably adjust this figure somewhat to account for people needing to drive long distances choosing to get a Tesla instead of a Leaf, e-Golf or something, but it's not unlikely that CSS/CHAdeMO will outnumber Tesla Superchargers 40:1 within a few years.
And finally, while we are currently in a honeymoon period of free rapid charging in the UK at least, this will not last more than another 6-12 months IMO. When an hour at a CHAdeMO point costs £10 but the superchargers are still free I think usage will be even more skewed towards the SC sites.
The CCS/CHAdeMO/Type 2 chargers we have here aren't free. But situations will undoubtedly arise where the nearest supercharger is 10+ miles away, but you have a CCS/CHAdeMO/Type 2 right where you are, and it makes more sense to pay to use it.