Following in the footsteps of the Xperia Z2, the Sony Xperia Z2 Tablet is available for pre-order. We made the rounds and collected the prices of the tablet around Europe. The launch date will be in April, the same time frame as the the Z2 phone.
The good news is that it's cheaper than the phone in most places – in the UK, it's £500 (€610) from Clove UK.

Update: The Xperia Z2 Tablet 16GB LTE is £500 on Sony's site. The Wi-Fi only versions are £400 for the 16GB and £450 for the 32GB. If you pre-order you get a free Magnetic Charging Dock too (normally, £40).

The price in Germany is €500 (and €650 from Sony's official web site). Note that these are pre-order prices and might change in time for the launch. The 32GB Wi-Fi model is €550, the 16GB LTE model is €650.

In France and the Netherlands the Xperia Z2 tablet is €630, €670 in Sweden (SEK 5 995,00) and €700 in Spain and Poland (PLN 2 899). These prices are from the official site, so it's possible that regional stores have it cheaper (like in Germany).