Last year, Bloomberg reported that a new model of Nintendo Switch Pro would be released in 2021. Today they report some more specific details, such as screen size and some 4K news. The original report was very clear on the details, just saying that Nintendo "Tried to include more computing power and high definition 4K graphics", but it has now been made clear to say that this new model will feature an OLED screen made by Samsung, which will be seven inches in diameter (current Switch models are 6,2 and 5,5 inches for the regular and Lite respectively) and have a resolution of 720p.
Also, perhaps more importantly, it will produce 4K images when connected to a TV, which will result in a huge resolution change when switching from dock to portable mode. Bloomberg's report says production on the new screens will begin in June, with "displays scheduled to ship to assemblers around July," meaning this new model would be ready "in time for the holidays". In addition to this, other aspects internal to the hardware of Nintendo Switch Pro should also be changed, considering that if the resolution in portable mode will remain 720p, according to Bloomberg's article the new console should still be able to reach 4K a once connected to the TV, therefore it is clear that in graphic terms it is a more powerful model than the current one, perhaps based on one review of the Nvidia SoC procedure.
During the latest financial report, the President of Nintendo Shuntaro Furukawa had confirmed the absence of plans for the launch of new hardware, citing only the special editions Nintendo Switch Mario Red & Blue Edition and Nintendo Switch Monster Hunter Rise Edition. It is unclear when the new Switch should hit store shelves, the report speaks of an announcement expected "later in 2021" while the release date is unknown.